捜査一課 そうさいっか Also written 捜査1課 Meanings Noun First Investigation Division (of the Japanese police) (i.e.: division responsible for investigating homicide, robbery, kidnapping, arson, and sexual assault) Kanji 捜 search. Read as ソウ. 査 examine 一 one. Read as イチ. 課 lesson. Read as カ. Jinuma: Japanese Dictionary · Word lists