How to say "marijuana" in Japanese

• マリファナCommon
  nounThe katakana loanword from 'marijuana'; a straightforward, widely understood way to refer to the drug in everyday conversation.
  マリファナについてトムと議論ぎろんした。↗

  I had an argument with Tom about the use of marijuana.
• 野菜やさいJLPT N5approx.Common
  nounLiterally 'vegetables' — its ordinary meaning — this is a playful slang way to refer to marijuana, heard in casual banter rather than serious discussion.
• 葉っぱはっぱCommon
  nounLiterally 'leaves'; a colloquial term for marijuana, close to English 'weed', that fits relaxed conversation but not formal or legal writing.
• 大麻たいまCommon
  nounThe word for cannabis used in news reports and legal contexts; it also covers hashish, making it the natural choice in serious or factual discussion of the drug.

For the drug itself, 「マリファナ」 is the straightforward loanword and 大麻 the term of news and law; 「葉っぱ」 is casual, like 'weed', and 野菜 a joking slang — both best kept to informal speech.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

• マリファナmarijuana
• ガンジャganja
• 野菜やさいmarijuana
• 草くさmarijuana
• 葉っぱはっぱmarijuana
• 大麻たいまcannabis