The ship Kukai was on was caught in a storm and significantly deviated from its scheduled route and finally drifted ashore at Sekiganchin, Chokei-ken, Fuku-shu on September 21, 804.
空海の乗った船は、途中で嵐にあい大きく航路を逸れて貞元(唐)20年（延暦23年、804年）8月10日、福州長渓県赤岸鎮に漂着。