(obsolete) in ancient Japan, the role driving away devils at a certain religious ceremony, or the driver of the hearse carrying the coffin of a deceased emperor

(historical) A 1939 Japanese government policy applied to then Korean colony which forced Koreans to change their surnames to Japanese-style surnames; abolished in 1945.

(Buddhism) think on the power of Kannon

(literally) know the other side and yourself, a hundred battles will not be perilous