Helpful invention for an investigation with 捜査

Kanji Explanation: Investigation and inspection with 査

Conan is now staying with Detective Mouri in hopes of finding a case related to the men responsible for his becoming a child. He stops by Professor Agasa’s place to discuss the situation.

阿笠(あがさ):: 「おお、そうじゃ！！」; “Oh, that's right!!”; 「君(きみ)の捜査(そうさ)の役(やく)にたつと思(おも)って、作(つく)った物(もの)を…」; “I made this thinking it might help with your investigation...”

Key Points

捜査(そうさ) = “investigation” in a detective/crime-solving sense
- Here 捜査(そうさ) means the work of investigating a case.
- The kanji 捜 adds the sense of searching, so 捜査(そうさ) is more like case investigation than a general inspection or examination.
の役(やく)にたつ = “to be useful for”
- 君(きみ)の捜査(そうさ)の役(やく)にたつ means “be useful for your investigation.”
- The first の links 君(きみ) to 捜査(そうさ) (“your investigation”), and the second の links that whole phrase to 役(やく)にたつ.
と思って = reason behind the action
- ～と思(おも)って、作(つく)った means “I made it thinking that…” or “because I thought…”
- It explains Agasa’s motivation for making the item before he reveals what it is.