私立探偵[shiritsutantei] private detective
探偵[tantei] detective
探偵小説[tanteishousetsu] detective story
偵察[teisatsu] scout out
偵察衛星[teisatsueisei] reconnaissance satellite

偵察機[teisatsuki] reconnaissance plane
偵察隊[teisatsutai] scouting party
偵知[teichi] spying
内偵[naitei] secret investigation
密偵[mittei] spy

御知らせ[oshirase] notice
かも知れない[kamoshirenai] may
かも知れません[kamoshiremasen] may
愛知県[aichiken] Aichi prefecture (Chuubu area)
井の中の蛙大海を知らず[inonakanokawazutaikaiwoshirazu] parochial

一知半解[icchihankai] superficial knowledge
伺い知る[ukagaishiru] to perceive
窺知[kichi] perception
恩知らず[onshirazu] ingratitude
われ知らず[wareshirazu] involuntarily