Translation guide
The English word 'helmet' refers to protective headgear. In Japanese, the most common equivalent is ヘルメット, a loanword used for sports, construction, and everyday safety. For traditional armor, 兜 (かぶと) is used. Other terms exist for specific contexts.
The learner wants to refer to a modern helmet for safety in activities like cycling, construction, or sports.
The standard loanword for most modern helmets. Used for cycling, construction, sports, etc.
Please wear a helmet when riding a bicycle.
A more formal term meaning 'protective hat', often used in official or technical contexts like workplace safety.
The learner wants to refer to a samurai or historical Japanese helmet.
The traditional samurai helmet, often seen in historical contexts, festivals, or as a decorative item.
The learner wants to refer to a helmet used in military or combat contexts.
The learner wants to refer specifically to a motorcycle helmet.
A compound meaning 'motorcycle helmet'. Often shortened to just ヘルメット in context.
The learner wants to refer to a helmet that is part of a specific uniform.
ヘルメット is the default for modern protective helmets. 兜 is specifically for traditional samurai helmets and is not used for modern safety gear. Using 兜 for a bicycle helmet would sound strange.
I wear a samurai helmet when riding a bicycle. (unnatural)
兜 evokes historical armor. For any modern helmet, use ヘルメット or a compound like バイク用ヘルメット.
Wearing a helmet is mandatory at the construction site.
作業員は保護帽を着用しなければならない。
Workers must wear protective helmets.
The samurai helmet for the Boys' Festival doll is splendid, isn't it?
I saw a real samurai helmet at the museum.
An alternative kanji for 兜, but less common. Sometimes used in historical texts.
Wear a helmet (archaic).
Literally 'iron helmet', commonly used for military helmets, especially from World War II era.
The soldier was wearing a steel helmet.
A descriptive term meaning 'combat helmet', used for modern military helmets.
The latest combat helmets are lightweight.
I want to replace my motorcycle helmet.
A full-face helmet, a specific type of motorcycle helmet.
Full-face helmets are highly safe.
Still the most common term, often used with a modifier like 消防 (firefighting) or 機動隊 (riot police).
Firefighters' helmets are heat-resistant.