順風満帆 (junpū manpan): smooth sailing, a fair wind and a full sail, the state of things going as well as they can. The word is Japanese, made of Chinese parts; the Chinese say it the other way round, 一帆風順. It began as a sailor's plain report. A legation ship's log printed in the government gazette reads
weighed anchor, fair wind, full sail, and a general's Pacific crossing of 1886 logs
fair wind, full sail, as yesterday; 244 miles. The figure came from a Confucian teacher of Tsu, who told his pupils what reading is like once the gates of the classics are passed:
fair wind, full sail; the greatest speed and the greatest joy. From the 1890s it is in prose, a sick man hoping for
a fair-wind, full-sail recovery, a book of 1904 on Japan itself
under fair wind and full sail, and by the 1930s it is the company histories' word for a good decade. The dictionaries were slow: none before the war lists it, and the Kōjien admitted it in 1983, a century after the kanbun. Two readings compete, and
manpan is the dictionaries' ruling over
manpo. Underneath is the proverb 順風に帆を上げる, to raise sail on a fair wind; 順風満帆 is that proverb with the doing removed, a state you are in rather than a thing you do. Its sister 一路順風 is the Chinese blessing for the journey's start.
four-character idiom 順風満帆 is composed of the word
順風 (read junpū) meaning "favorable wind" and the
kanji 満 (read man) meaning "full" and
帆 (read pan) meaning "sail".