Translation guide
The English word "bike" can mean either a bicycle or a motorcycle. In Japanese, these are distinct words, and context usually makes the meaning clear. This guide helps you choose the right term and use it naturally.
Referring to a pedal-powered two-wheeled vehicle.
I ride my bike to work. · Can I borrow your bike? · He fell off his bike.
The standard word for bicycle. Safe in any context.
Referring to a motorized two-wheeled vehicle.
He bought a new bike. It's a Harley. · I prefer bikes to cars. · She rides a bike to work, but it's a scooter.
The English word 'bike' can mean bicycle or motorcycle, but Japanese has separate words. Using バイク for bicycle will cause confusion. Always consider the context: if it's pedal-powered, use 自転車; if motorized, use バイク.
In English, 'bike' alone can be ambiguous, but in Japanese, the word choice immediately clarifies the type. When translating from English, decide based on the situation.
I go to school by bike.
新しい自転車を買った。
I bought a new bike.
Casual slang for bicycle, common in everyday conversation among friends.
チャリで来たよ。
I came by bike.
Refers specifically to a typical city bicycle with a basket, often used by mothers for shopping. Not a general term for bike.
ママチャリで買い物に行く。
I go shopping on my mamachari bike.
The most common word for motorcycle. Note that it does not mean bicycle in Japanese, despite sounding like the English word.
Do not use バイク to mean bicycle. It always means motorcycle.
バイクの免許を取った。
I got a motorcycle license.
バイクでツーリングに行く。
I go touring on my bike.
A slightly more formal or technical term for motorcycle. Less common in casual speech.
オートバイの整備をする。
I maintain my motorcycle.
Literally 'single vehicle', used in legal or technical contexts, or by motorcycle enthusiasts. Not for everyday use.
単車のカスタムが趣味です。
Customizing motorcycles is my hobby.