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精神統一 seishin tōitsu Concentration

Japanese Scroll of Concentration (seishin tōitsu) — Calligraphy by Eri Takase
精神統一 Original Scroll by Master Calligrapher Eri Takase

Abstract

精神統一, seishin tōitsu, the mind made one, is a Japanese compound with no Chinese source found and no known author, first found in print in the 1890s in the books of the scholars who were building a Japanese vocabulary for philosophy and psychology. Through the 1910s it became the name of a practice, taken up by hypnotists, quiet-sitters and the subjects of the era's clairvoyance experiments, and in 1918 a Zen master called it the fashion, the year a novelist put it into a story. By the 1920s and 1930s it was an ordinary word in the kendō, kyūdō, tea-ceremony and zazen manuals for the gathering of the mind before an act, and 福来友吉's 1926 definition, every idea working together toward one aim, still fits it. Kenkyūsha's Japanese-English dictionary renders it by 1942, and the earliest English prose the Internet Archive's full-text index reaches has it in 1965, in a scholar's account of Japan's mountain ascetics, then in a dictionary of idioms, a magazine article by an aikidō teacher, books on Japanese religion and on calligraphy, and Eri Takase's 1999 essay for the magazine Kampsport; from the 2000s the Reiki books took it up from their own Japanese practice, and they are the largest single group in the Internet Archive's full-text hits for the romaji.

A reading

A word with no source is still a text with a history, and this one's is clean and short. 精神統一 first appears in the 1890s, in the vocabulary the Japanese were making for philosophy and psychology, for the unity of the mind; in the 1910s it became something one does, in the hypnotists' and quiet-sitters' manuals and the clairvoyance laboratory, a fashion a Zen master named and a novelist put into a story; and by the 1930s it was a plain word in the kendō and kyūdō manuals, the tea school's procedure and the zazen primer for the gathering of the mind before an act. 福来's definition of 1926 — every idea working together toward one aim, in two stages, the mind swept clear and the one aim held — names it exactly, and the kyūdō sentence of 1937 on the archer's silent bow toward the target mound, not a prayer to hit … a rite toward the universe, is the ground worth reading for anyone coming to it through the martial arts.

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Overview

The sense. The mind made one: first the philosophers' unity of consciousness, then, from the 1910s, the practitioner's gathering of the mind on one thing before an act — the sense the kendō and kyūdō manuals of the 1920s and 30s settled and the dictionaries give today. Put together, 精神統一 is the mind made one. Kotobank's page for the compound carries neither of the two great dictionaries; a dictionary of four-character phrases defines it as to concentrate the mind on one point when doing something and gives as examples of use a story of 1918 and a line from 1977 [1]; Kenkyūsha's Japanese-English dictionary gives concentration of mind; mental concentration [2], the gloss JMdict carries, adding (on some task) to mental concentration [1]. The Japanese Wikipedia has no article for it and sends the reader to meditation [1].

The words. Seishin tōitsu, two words. Two words, one old and one new to Japanese. 精神 is the mind or spirit; the big dictionary has it from an eighth-century note in the Man'yōshū and grounds it in Zhuangzi, where the spirit flows out in all four directions, reaching up to heaven and coiling down to earth; its third sense, a mind bent on reaching its aim, 目的を達成しようとする心の働き。気力, is the one this compound uses, and the 大辞泉, whose like sense reads 物事をなしとげようとする心の働き。気力, gives 「精神統一」 as its example; and the modern word also stands for the West's spirit, esprit and Geist [3]. 統一 is to make one: a Chinese word the Book of Han uses of the Western Regions, many states and no unity, which the Japanese dictionary first cites from a scholar's handbook of 1783; its philosophical sense, unity, a translation of the English word, the dictionary illustrates from a dictionary of terms of 1905 [4].

The text in English. Kenkyūsha's dictionary has it by 1942, as mental concentration; the earliest English prose the Internet Archive's full-text index reaches has the romaji in 1965, and Eri Takase's 1999 essay stands in the middle of its English history.

The historical record

The philosophers, 1890 to 1897. The word first appears in the books of the men who brought Western philosophy and psychology into Japanese. A commentary on the elementary-schools law of 1890 asks how, without national schooling, one could 國民精神ヲ統一シ, make the nation's spirit one [5]. In the National Diet Library's full-text index, the earliest known printing of the compound is a chapter summary in the 哲学雑誌 of September 1894 (an essay in the 日本弘道叢記 of February 1894 has the four characters in a row, 物產愛護の精神統一ならず, the spirit of caring for the products is not united, where 統一 is still the predicate, not yet part of a word), whose second chapter argues that the mind's several faculties and 精神統一 can stand together [6]. The earliest that can be read whole is 谷本富's Lectures on Scientific Pedagogy (1895), a Herbartian's survey of philosophy since Kant: Fichte held Kant's categories 精神統一の義と相容れず, incompatible with the unity of the mind; the fourth of the objections he lists against Herbart's psychology, after attention, the persistence of ideas and their inhibition, is 精神統一の事, the unity of the mind; and Wundt made apperception 精神統一の淵源, the source of the mind's unity [7]. Two years later a translation of Höffding's psychology speaks of 精神統一テフ純然タル靈魂的思想, the purely spiritual doctrine of the unity of the soul [8], and 元良勇次郎, Japan's first professor of psychology, makes unity, 統一, the ground of personhood in his Ten Lectures on Psychology: 統一ハ實ニ人格ノ基礎ナリ, unity is the very basis of personality; lose it and the person dissolves, as in madness; it has a rational, ordered form and a natural, emotional one, and his table of contents lists a section on the physiological basis of the unity of the mind [9]. In the same year a teaching manual uses it for the Herbartian idea that the school subjects should be bound into one, with moral thought at the center [10]. Three senses in one decade — the soul as one, the curriculum as one, the nation as one — and none of them yet a person sitting still.

The practice, 1911 to 1918. The national index counts seven books using the word in the 1890s, sixteen in the 1900s, a hundred and thirty-one in the 1910s. The first book with the word in its title is 渡邊歸一's The Theory of Concentration, Clairvoyance and Clairaudience (1911) [11], from the year of the 千里眼 affair, when 福来友吉's subject 長尾郁子 said she could not 精神統一 if anyone doubted her [12]. From then the word is the name of a method. A health manual of 1913 gives a 精神統一法 for sleeplessness, count from one to ten and again [13]; a hypnotist's textbook of the same year says hypnotism is nothing but a method of fixing the subject's attention on one point, that is, a 精神統一法, and describes the breathing exercise by which 雜念去りて精神統一し, the stray thoughts leave and the mind becomes one … which is what the Zen school calls entering samādhi [14]. 岡田虎二郎's quiet-sitting swept the decade, and his recorded words refuse the word: 無念無想になろうとか、精神統一とか、精神集中なんどは一切考えてはいけません, do not think about becoming empty of thought, or about concentration, or about focus, at all [15]. A self-study book was titled Concentration Self-Taught in 1915 [16]. The Zen side noticed. A Zen primer of 1915 says Zen has become fashionable, some say for training the will, some say for 精神統一, and they have not understood what Zen means [17]; and the Engakuji master 釈宗演, lecturing in 1918, says 近頃精神統一といふ文字が流行りますが、即ち身心統一の極に達した時はさうであります, lately the phrase 精神統一 is in fashion; it is what you reach at the limit of making body and mind one, and elsewhere defines samādhi as the point where the unity of my mind is complete [18]. A ninjutsu writer of 1917 sets the ninja against what the world calls 精神統一, which pushed far enough brings on thought-photography, clairvoyance and hypnosis, and asks instead for body and mind made one together [19]. The novelist 葛西善蔵 caught the fad in Taking the Child (March 1918): a policeman friend demonstrates his own quiet-sitting method, kept up for ten years, his upper body twisting and his forehead running with sweat, and 横井はそれを「精神統一」と呼んだ … 精神統一を練習し給え, Yokoi called it concentration … you should practice concentration — it helps him spot a suspect [20]; this is the sentence the phrase dictionary gives as its first example of use. Beside all this the psychologists kept their sense: a 1918 translation of Coriat's Abnormal Psychology renders his mental synthesis, the opposite of dissociation, as 精神統一 [21].

The definition, 1926. 福来友吉, the psychologist of the 千里眼 affair, gave three lectures at 山口 in October 1925 and printed them as The Psychology of Concentration (1926). His definition: 精神統一とは、あらゆる一切の觀念が、一の目的實現に向つて共同一致して活動する狀態を云ふ, concentration is the state in which every idea works together toward the realization of one aim; it has two stages, 無念無想, the sweeping away of every stray thought until the mind is a clear mirror and still water, and 一念堅持, holding the one aim firmly in that stillness [22]. His examples are a jūjutsu master of Kumamoto, 星野九門, who told him that when a master pins something with a fingertip it is not the fingertip; the whole body's strength is gathered there, an archer of old China who learns not to blink and to see a louse as a cartwheel (a story 福来 tells without naming its book; it is the Liezi's 紀昌), and the iai master 日比野雷風, whose draw is too fast for the eye [22].

The manuals, 1919 to 1939. By the 1920s the word is the plain one in the martial manuals, and by the 1930s in the ceremonial ones too. A military psychology of shooting and fencing (1919): 射擊に於ては其精神は能く統一せらるゝを要す, in shooting the mind must be well unified, and the kiai arises when the mind is unified [23]. 堀田捨次郎's illustrated kendō manual (1922) lists among the aims of kendō training 四、精神を統一せしむ, fourth, to unify the mind, and teaches 精神を竹刀の一事に集中して精神を統一し, gather the mind on the single matter of the shinai [24]. In the volume recording the 1934 tournament before the emperor, a kendō fourth-dan from Aomori gives as the third reason he won: 勝敗を全然度外視し無慾の精神により完全に精神統一が出來, having set winning and losing wholly aside, my mind came fully together through a spirit without desire, I did not stiffen, and I fought with all I had [25]. A self-defense manual of 1935 has a sixth method, 精神統一法: count the breaths to a hundred [26]. The kyūdō textbooks make it the first condition of a correct shot. 竹内尉's Kyūdō Reader (1937): if you cling to the target, 精神の統一は亂れ, the unity of the mind is disturbed, and the target itself becomes 精神統一を破る邪魔物, the obstacle that breaks concentration; the silent bow the archer makes toward the target mound is not a prayer to hit; it is a rite toward the universe, and a rite toward the universe means making one's own mind one and holding oneself in restraint [27]. The women's kyūdō guide of 1938: 完全な精神統一を必要とする … はじめて正しい射が行はれ得る, a complete concentration is required; only with concentration, composure, calm and decision is a correct shot possible [28]. The Mushanokōji tea school's procedure book (1939) writes it into the sequence: 默禮をなして居ずまひを正し精神統一, bow in silence, settle the posture, concentrate [29]. A zazen primer of 1936: with the mind settled, 精神を統一し、不動の三昧に安住する, make the mind one and rest in unmoving samādhi, and everything is zazen [30]. The temple, the sword and the tea room, which Eri Takase's essay names beside the brush, each had the word in print before the war, and so did kyūdō.

After the war. The hypnotists kept the compound in their titles into the 1980s [31]; a 1962 newspaper profile of a weightlifting coach is headed 力より精神統一, concentration over strength [31]; the phrase dictionary's second example, from Inoue Hisashi's 『月なきみそらの天坊一座』 (1977), has a character say no, I really am trying to do seishin tōitsu [1]; and a spiritualist society, the 日本心霊科学協会, holds a 精神統一研修会 every day [32]. The word is ordinary Japanese: a headband, the Japanese Wikipedia says, is worn when concentration or morale is needed [32].

What is not a source. Not Chinese, as far as the searches reach: Chinese Wikisource has the four characters only in Republican-era texts, and the NDL Lab's classical books have none [33]. Not Zen: 宗演 in 1918 calls the phrase a current fashion and folds it into his own 身心統一 and 三昧, and the 1915 primer names it among the reasons people take up Zen. Not 岡田虎二郎's, who disowned it. Not a maxim with an author. The classical neighbor a reader may be thinking of is 精神一到何事か成らざらん, where the mind reaches, what can it not accomplish, from the Zhuzi yulei; a hanging scroll with its eight characters, 精神一到何事不成, appears in a novel of 1885–86, and the national index finds it in over two thousand pre-war books [34]. That phrase is on the occasion shortlist; this word is the modern one.

The word in English

1942 to 1974. The dictionaries. Kenkyūsha's Japanese-English dictionary, in its American printing of 1942, enters the word twice: under 精神, mental concentration, and under 統一, psychic concentration [35]. Its fourth edition of 1974 gives concentration of mind; mental concentration [2]. The earliest known dictionary in this study's sweeps to print the romaji is Corwin's Kodansha dictionary of idioms (1968): seishin tōitsu 精神統一 concentration of thought; collecting of one's thoughts [36].

1965 to 1989. Before the essay. The earliest use in English prose that the Internet Archive's full-text index reaches is Carmen Blacker's paper on initiation among the mountain ascetics of Shugendō (1965): once their efforts at repentance slackened, the quality in the order of seishin-toitsu, of the intense concentration of mind which is for the Japanese the beginning … [37]. In Esquire for March 1976 the aikidō teacher Terry Dobson, writing with Brooke Miller on how to avoid being mugged, uses it as a state and, wrongly, as a name for a kind of person: the awake people are called seishin-toitsu … the Japanese spend a lot of time developing seishin-toitsu, through Zen, aikido, plus the other martial arts … a sense of unity, alertness — in other words, seishin-toitsu [38]. Joe Hyams's Playboy's Book of Practical Self-Defense (1981) repeats the sentences [39]. In 1976 too, Robert Frager and Thomas Rohlen, writing on Japanese spirit for a Yale volume, give it plainly: One phrase for concentration, seishin toitsu, literally means "seishin unification" [40]. The Jesuit William Johnston sets it beside the Sanskrit ekāgratā: the Japanese seishin toitsu ('unification of spirit') (1978) [41]. Masaaki Hatsumi's Essence of Ninjutsu (1988) has it as a heading, Ninjutsu Daihi Seishintoitsu Shuyouikkan, in one-word romaji [42]. And a book on calligraphy gives it to the brush: thereby achieving a form of unified Spirit seishin toitsu (Earnshaw, 1989) [43].

1999. Eri Takase's essay for Kampsport. Eri Takase's essay, published in January 1999: my dictionary … says it means "concentration" or here "concentration of mind". While this definition is true, it is also unsatisfactory; the word is when my spirit (seishin) is gathered (touitsu), when my mind (seishin) is one (touitsu), reached through the temple gate, the grinding of the ink, the tea ceremony and the sword [44].

2000 onward. The tattooist, the archer's critic and the Reiki books. In 2000 the Japanese tattoo artist Kazuo Oguri, in Steve Gilbert's Tattoo History, says of drawing and of tattooing that you must do it with total concentration … We also call this state of mind seishin toitsu [45]. In 2001 Yamada Shōji, tracing how Zen came to be read into Japanese archery, names it among the commentators' commonplaces: Commentators commonly assert that "kyūdō leads to spiritual focus" (seishin tōitsu 精神統一) or that "kyūdō resembles Zen" [46]. Then the Reiki books, which take the word from their own Japanese sequence: it is the third part of hatsurei-hō, which the Reiki writers report from the Japanese Usui Reiki Ryōhō Gakkai through the teacher Doi Hiroshi [47]. The earliest with a printed date in the Archive's full text is French, Patrice Gros's Reiki: ouvrir le cœur, éveiller l'esprit (2001; the index dates four Romanian rows earlier, years not checked against the books): SEISHIN TOUITSU (concentration de l'esprit …) [48]. In English, Penelope Quest (2003, 2007, 2010) gives concentration or meditation; Bronwen and Frans Stiene's Japanese Art of Reiki (2005) and Reiki Sourcebook give Seishin Toitsu: a unifying the mind meditation; Nina Paul (2005) attaining a unified mind; Nicholas Pearson (2018) the final stage of hatsurei [49]. Of the fifty-eight hits the Internet Archive's full text returns for the romaji (30 September 2026), thirty-three are Reiki manuals.

Today. The house writes the two words as one. Kenkyūsha's concentration of mind, which JMdict carries, matches the gloss Eri Takase's essay quotes from my dictionary (it does not name the dictionary), and the house keeps it; the gloss above, the mind made one, keeps 統一's plain sense. One word, two senses in sequence. From 1890 to the 1900s, the unity of the mind: a philosopher's and psychologist's term for consciousness as one thing, the ground of personhood, the curriculum as one. From the 1910s, the gathering of the mind on one thing: a method, then a state, first in the hypnotists' and quiet-sitters' books and the 千里眼 laboratory, then, by the 1920s and 30s, in the kendō, kyūdō, tea and zazen manuals. The two senses meet in 福来's 1926 definition, every idea working as one toward one aim, and in 宗演's the limit of making body and mind one. The house's Concentration is the second sense and is right.

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Japanese Scrolls by Master Calligrapher Eri Takase

Japanese Scroll of Concentration (seishin tōitsu) in a block font by Master Japanese Calligrapher Eri Takase
精神統一VB3CBlock
Japanese Scroll of Concentration (seishin tōitsu) in a cursive font by Master Japanese Calligrapher Eri Takase
精神統一VC4BCursive
Japanese Scroll of Concentration (seishin tōitsu) in Master Japanese Calligrapher Eri Takase's own style (Eri's Choice)
精神統一VD4BEri's Choice
Japanese Scroll of Concentration (seishin tōitsu) in a semi-cursive font by Master Japanese Calligrapher Eri Takase
精神統一VS4CSemi-Cursive

References

  1. 「精神統一」, 四字熟語を知る辞典, at kotobank; JMdict (EDRDG) 2031630; 「精神統一」, redirect, at Japanese Wikipedia. https://kotobank.jp/word/精神統一 · https://ja.wikipedia.org/wiki/精神統一
  2. 増田綱 ed., Kenkyusha's New Japanese-English Dictionary 新和英大辞典, 4th ed., Kenkyūsha, 1974, p. 1469, s.v. seishin, and p. 1811, s.v. tōitsu.
  3. 「精神」, 精選版日本国語大辞典・大辞泉・世界大百科事典, at kotobank; 莊子, 刻意, at zh.wikisource. https://kotobank.jp/word/精神 · https://zh.wikisource.org/wiki/莊子/刻意
  4. 「統一」, 精選版日本国語大辞典・大辞泉・字通, at kotobank. https://kotobank.jp/word/統一
  5. 日下部三之介, 小学校令釈義, 1890, scan 16. https://dl.ndl.go.jp/pid/797495/1/16
  6. 『哲学雑誌』, 哲学会, September 1894 (NDL Digital pid 3557947, viewable only in the library; read as the full-text snippet); 日本弘道叢記, February 1894 (pid 2228236, Japan only; read as the full-text snippet); the NDL Digital full-text index, 精神統一, all access levels, oldest first (2 November 2026). https://dl.ndl.go.jp/pid/3557947 · https://dl.ndl.go.jp/pid/2228236
  7. 谷本富, 科学的教育学講義, 六盟館, 1895, scans 60, 65 and 76 (pp. 100, 111, 133). https://dl.ndl.go.jp/pid/808195/1/60 · https://dl.ndl.go.jp/pid/808195/1/65 · https://dl.ndl.go.jp/pid/808195/1/76
  8. ヘフヂング (石田新太郎訳), 心理学, 1897, scan 27. https://dl.ndl.go.jp/pid/759734/1/27
  9. 元良勇次郎, 心理学十回講義, 1897, scan 99, and scan 7 (目次, p. 9: 精神統一ノ生理的基礎ニ就テ). https://dl.ndl.go.jp/pid/759759/1/99 · https://dl.ndl.go.jp/pid/759759/1/7
  10. 土井亀之進, 実験普通教授学, 1897, scan 9. https://dl.ndl.go.jp/pid/810172/1/9
  11. 渡邊歸一, 精神統一千里眼千里耳の學説, 日韓書房, 1911. National Diet Library Search catalogue (not digitized).
  12. 「福来友吉」, at ja.wikipedia. https://ja.wikipedia.org/wiki/福来友吉
  13. 樫田十次郎, 体力精力増進法, 1913, scan 16. https://dl.ndl.go.jp/pid/935515/1/16
  14. 北川潔, 科学的催眠学, 1913, scans 79 and 107. https://dl.ndl.go.jp/pid/949389/1/79 · https://dl.ndl.go.jp/pid/949389/1/107
  15. 「岡田式静座法」, 語録, at ja.wikipedia. https://ja.wikipedia.org/wiki/岡田式静座法
  16. 横井無隣, 内観録：精神統一自習書, 内観寮, 1915. National Diet Library Search catalogue.
  17. 渡辺約山, 禅学活要, 1915, scan 220. https://dl.ndl.go.jp/pid/944036/1/220
  18. 釈宗演, 禅海一瀾講話, 1918, scan 101, and scan 56 (p. 93, 三昧といふのは全く我が精神の統一の極に至つた所). https://dl.ndl.go.jp/pid/943659/1/101 · https://dl.ndl.go.jp/pid/943659/1/56
  19. 伊藤銀月, 忍術の極意, 1917, scan 85. https://dl.ndl.go.jp/pid/1088342/1/85
  20. 葛西善蔵, 子をつれて, 早稲田文学, March 1918, at Aozora Bunko, card 47059. https://www.aozora.gr.jp/cards/000984/files/47059_30421.html
  21. コーリアット (佐藤亀太郎訳), 変態心理学, 1918, scan 19; Isador H. Coriat, Abnormal Psychology, revised edition (Dodd, Mead, copyright 1910, 1914), p. 8, A mental dissociation is, therefore, directly opposite to a mental synthesis, read at the page in the Internet Archive's copy, an eighth printing of 1926; the Archive's full text of the first edition (Moffat, Yard, 1910) does not carry the sentence. https://dl.ndl.go.jp/pid/980621/1/19 · https://archive.org/details/abnormalpsycho00cori/page/8/mode/1up
  22. 福来友吉, 精神統一の心理, 日本心霊学会, 1926, scan 71, and scans 72–73 (the archer, the louse, 日比野雷風); the preface, scans 3–4 (昨年の十月上旬 … 山口佛教會館 … 前後三回の講演, dated 大正十五年六月). https://dl.ndl.go.jp/pid/981789/1/71 · https://dl.ndl.go.jp/pid/981789/1/72 · https://dl.ndl.go.jp/pid/981789/1/73 · https://dl.ndl.go.jp/pid/981789/1/3. The archer is 紀昌 in 列子, 湯問 (視小如大 … 三年之後，如車輪焉), at zh.wikisource. https://zh.wikisource.org/wiki/列子/湯問篇
  23. 下沢瑞世 (編), 射撃と剣術並に航空術の心理, 兵事雑誌社, 1919, scan 14, and scan 59 (心氣は靜まり精神は統一して氣合を生ずるものなり). https://dl.ndl.go.jp/pid/942248/1/14 · https://dl.ndl.go.jp/pid/942248/1/59
  24. 堀田捨次郎, 図解剣道教範, 1922, scan 12, and scans 20–21 (pp. 21–22, the second quotation runs across the page). https://dl.ndl.go.jp/pid/965095/1/12 · https://dl.ndl.go.jp/pid/965095/1/20 · https://dl.ndl.go.jp/pid/965095/1/21
  25. 昭和天覧試合, 1934, scan 307. https://dl.ndl.go.jp/pid/1232699/1/307
  26. 武道極意護身術秘伝, 1935, scan 130. https://dl.ndl.go.jp/pid/1025860/1/130
  27. 竹内尉, 弓道読本, 1937, scan 44, and scan 49 (p. 76, the silent bow). https://dl.ndl.go.jp/pid/1052433/1/44 · https://dl.ndl.go.jp/pid/1052433/1/49
  28. 女子弓道指針, 1938, scan 7. https://dl.ndl.go.jp/pid/1054810/1/7
  29. 千家官休庵流点前, 1939, scan 78. https://dl.ndl.go.jp/pid/1239799/1/78
  30. 中根環堂, 坐禅の極意, 1936, scan 20. https://dl.ndl.go.jp/pid/1036952/1/20
  31. National Diet Library Search catalogue, postwar titles carrying 精神統一法 (小菅一男 1957; 世和玄次 1974) and the phrase in other titles, among them プロフイル⑬ 秋田短大ウエイトりフテング監督戸田忠氏 力より精神統一, 秋田魁新報, 12 February 1962 (catalogue row only, the article not seen). https://ndlsearch.ndl.go.jp/books/R100000094-I911521
  32. 「鉢巻」・「日本心霊科学協会」, at ja.wikipedia. https://ja.wikipedia.org/wiki/鉢巻 · https://ja.wikipedia.org/wiki/日本心霊科学協会
  33. zh.wikisource, search for 精神統一 (11 hits, all Republican-era); NDL Lab book search, 精神統一, classical-books facet 0 of 1,184 (7 September 2026). https://zh.wikisource.org
  34. 「精神一到何事か成らざらん」, at kotobank (朱子語類, and 坪内逍遙, 1885). https://kotobank.jp/word/精神一到何事か成らざらん
  35. 武信由太郎 ed., Kenkyusha's New Japanese-English Dictionary, American edition, Harvard University Press, 1942, p. 1606, s.v. seishin, and p. 1992, s.v. tōitsu.
  36. Charles Corwin, A Dictionary of Japanese and English Idiomatic Equivalents 和英熟語慣用句辞典, Kodansha International, 1968 (seventh printing 1986), § 188 shūchū, at Internet Archive. https://archive.org/details/waeijukugokanyku0000unse
  37. Carmen Blacker, "Initiation in the Shugendō: The Passage through the Ten States of Existence", in C. J. Bleeker, ed., Initiation, E. J. Brill, 1965, at Internet Archive (a lending copy: read in the Archive's full-text search, the page image not opened). https://archive.org/details/initiationcontri0000unse
  38. Terry Dobson and Brooke Miller, "How to Avoid Being Mugged", Esquire, vol. 85, no. 3, March 1976, at Internet Archive (a lending copy: read in the Archive's full-text search, the page image not opened). https://archive.org/details/esquire_1976-03_85_3
  39. Joe Hyams, Playboy's Book of Practical Self-Defense, Playboy Press, 1981, at Internet Archive (a lending copy: read in the Archive's full-text search, the page image not opened). https://archive.org/details/playboysbookofpr00hyam
  40. Robert Frager and Thomas P. Rohlen, "The Future of a Tradition: Japanese Spirit in the 1980s", in Lewis Austin, ed., Japan: The Paradox of Progress, Yale University Press, 1976, at Internet Archive (a lending copy: read in the Archive's full-text search, the page image not opened). https://archive.org/details/sunatnoonanatomy0000wils
  41. William Johnston, The Inner Eye of Love: Mysticism and Religion, Harper & Row, 1978, at Internet Archive (a lending copy: read in the Archive's full-text search, the page image not opened). https://archive.org/details/innereyeoflovemy00john
  42. Masaaki Hatsumi, Essence of Ninjutsu: The Nine Traditions, Contemporary Books, 1988, at Internet Archive (a lending copy: read in the Archive's full-text search, the page image not opened). https://archive.org/details/essenceofninjuts00hats
  43. C. J. Earnshaw, Sho: Japanese Calligraphy, Charles E. Tuttle, 1989, at Internet Archive (a lending copy: read in the Archive's full-text search, the page image not opened). https://archive.org/details/shojapanesecalli0000earn
  44. Eri Takase, "Seishintouitsu", Kampsport, January 1999, at takase.com Library. https://takase.com/library/seishintouitsu-concentration-of-mind
  45. Kazuo Oguri, in Steve Gilbert, Tattoo History: A Source Book, Juno Books, 2000, at Internet Archive (a lending copy: read in the Archive's full-text search, the page image not opened). https://archive.org/details/tattoohistorysou0000gilb
  46. Yamada Shōji, "The Myth of Zen in the Art of Archery", Japanese Journal of Religious Studies 28/1–2 (2001), p. 2, at Internet Archive (the article PDF, read at the page). https://archive.org/details/YamadaShojiTheMythOfZenInTheArtOfArchery
  47. William Lee Rand, Reiki: The Healing Touch, revised edition with the Japanese Reiki techniques, Vision Publications (the Archive's copy undated; it cites works of 2002), at Internet Archive (a lending copy: read in the Archive's full-text search, the page image not opened). https://archive.org/details/reikihealingtouc0000unse
  48. Patrice Gros, Reiki: ouvrir le cœur, éveiller l'esprit, Éditions du Rocher, 2001, at Internet Archive (a lending copy: read in the Archive's full-text search, the page image not opened). https://archive.org/details/reikiouvrirlecoe0000patr
  49. Bronwen and Frans Stiene, The Reiki Sourcebook, O Books, 2003, and The Japanese Art of Reiki, 2005; Penelope Quest, Self-Healing with Reiki, 2003, The Basics of Reiki, 2007, and Reiki for Life, 2010; Nina Paul, Reiki for Dummies, 2005; Nicholas Pearson, Foundations of Reiki Ryōhō, 2018, at Internet Archive (lending copies: read in the Archive's full-text search, the page images not opened). https://archive.org/details/reikisourcebook0000stie

Authors

Tim Jackowski (Systems Architect, Takase Studios, LLC) · 典 Ten (Anthropic Claude Fable 5.1, Sonnet 5 and Opus 5.5, Takase Studios, LLC)

AI written · Ten wrote the history. Tim Jackowski commissioned it and answers for it.

Checked · Claude Sonnet (Anthropic), 2026-09-15, citations — every address tested; every body claim with a fully-provided address resolves, both Eri-essay quotes included; the rest not openable — several NDL leaves and an Aozora card not supplied, plus live URLs; nothing found to differ · Claude Sonnet (Anthropic), 2026-11-02, citations — every claim tested at its address; none fails; each that differed was judged at the page image and corrected or held; the snippet-only, lending, print and catalogue sources could not be opened by the checker · two fresh-context readers (Claude), 2026-11-02, every claim in the page's summary block traced to its source: round 1 FAIL on two claims stated past their instrument, narrowed; round 2 FAIL on one (Wundt set against the unity of the mind, where he makes apperception its source), corrected; round 3 PASS from both, no wrong fact, wordings narrowed at the sources

Research depth: step 3 of our 10-step ladder, foundation complete · November 2026

Cite as: Tim Jackowski and Ten, "Philology of 精神統一 (seishin tōitsu)," Takase Studios, 2026, https://takase.com/library/philology/seishin-toitsu.