If we assume that there was a time lag of 2 uns (120 years; 1 un is equivalent to 60 years) of kanshi (Chinese calendrical system) in the year recorded in "Nihonshoki" and consider Sotsuhiko as the same person as 'Hisachiku,' there is a possibility that Sotsuhiko was a legendized man who existed in the 4th century and was sent to Korea around 382 and brought some prisoners from the war.
従来、この「沙至比跪」と襲津彦を同一人とし、『書紀』紀年を修正して干支2運繰り下げて、壬午年を382年と解釈すると、襲津彦は4世紀末に実在した人物であり、朝鮮から俘虜を連れ帰った武将として伝承化されている可能性などが指摘されてきた。