Translation guide
The drug heroin. In Japanese, it is most commonly referred to as ヘロイン, a direct loanword from English. Other terms exist but are less common or technical.
Referring to the illegal opioid drug
The standard Japanese word for heroin, borrowed from English. Used in news, medical contexts, and everyday speech.
彼はヘロイン中毒で亡くなった。
He died of heroin addiction.
警察が大量のヘロインを押収した。
The police seized a large amount of heroin.
The chemical name for heroin (diacetylmorphine). Used in scientific or pharmacological contexts.
ヘロインは化学的にはジアセチルモルヒネと呼ばれる。
Heroin is chemically called diacetylmorphine.