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原因調査 (げんいんちょうさ) — investigation (to determine the cause of something)
原因調査
investigation (to determine the cause of something)
調査 ちょうさ
investigation; examination; inquiry; enquiry; survey
調査中 ちょうさちゅう
under investigation
調査結果 ちょうさけっか
results (of a study or investigation)
調査会社 ちょうさがいしゃ
(private) investigation company; research agency
原因 げんいん
cause; origin; source