捜査四課 そうさよんか Also written 捜査4課 Meanings Noun Fourth Investigation Division (of the Japanese police) (i.e.: division responsible for investigating organized crime and the yakuza) Kanji 捜 search. Read as ソウ. 査 examine 四 four. Read as よん. 課 lesson. Read as カ. Jinuma: Japanese Dictionary · Word lists