How to say "motorcycle" in Japanese

• バイクCommon
  nounThe everyday word for a motorcycle or motorbike, borrowed as an abbreviation of オートバイ. Use it in ordinary conversation about riding, owning, or parking a motorcycle.
  ビルはバイクをとても欲ほしがった。↗

  Bill was crazy for a motorbike.
• オートバイJLPT N4approx.Common
  nounThe full loanword for a motorcycle or motorbike. It covers the same vehicles as バイク and is natural in writing, announcements, and contexts where a slightly more formal term fits.
  オートバイに乗のるのは楽たのしい。↗

  It's fun to ride a motorcycle.
• モーターサイクルCommon
  nounA direct transliteration of 'motorcycle'. Understandable, but it is seldom the word you want; バイク or オートバイ are the usual choices in actual Japanese usage.

All three translate 'motorcycle'; 「バイク」 is the everyday word, 「オートバイ」 is also common and slightly more formal, while 「モーターサイクル」 is rarely the word you want.

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

• バイクmotorcycle
• オートバイmotorcycle
• モーターサイクルmotorcycle
• 自動二輪車じどうにりんしゃmotorcycle (with a displacement of 50cc or more)
• 自動二輪じどうにりんmotorcycle (with a displacement of 50cc or more)
• 単車たんしゃtwo-wheeled motor vehicle
• モーターバイクmotorbike
• 鉄馬てつばmotorcycle
• ばたばたmotorcycle