| 捜査 | そうさ | search (esp. in criminal investigations), investigation, inquiry, enquiry |
| 特捜 | とくそう | special investigation |
| 捜索 | そうさく | search (esp. for someone or something missing), investigation |
| 捜し回る | さがしまわる | to hunt around, to search about for |
| 捜す | さがす | to search (for something lost), to seek (a suspect in a crime); to search (for something desired, needed), to look for |
| 捜索隊 | そうさくたい | search party |
| 聞き込み捜査 | ききこみそうさ | (police) legwork |
| あら捜し | あらさがし | finding fault, being picky |
| 家宅捜査 | かたくそうさ | premises search, household search |
| 家宅捜索 | かたくそうさく | premises search, household search |
