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問題 もんだい
question (e.g. on a test); problem
時間の問題 じかんのもんだい
matter of time; question of time
大問題 だいもんだい
big problem; major issue; big controversy
問題化 もんだいか
problematization; making an issue of (something); becoming a problem; becoming an issue
別問題 べつもんだい
different thing; another question; different case