Translation guide
Describing or referring to a large penis in Japanese, from medical terms to slang.
Informal, often vulgar ways to say 'large penis' in everyday conversation or media.
Polite or clinical ways to describe a large penis without vulgarity.
Direct, neutral phrase. 'Ōkii' means big, 'penisu' is the loanword for penis.
彼は大きいペニスを持っている。
He has a large penis.
Ways to imply a large penis without explicit words, often in jokes or polite company.
Euphemism meaning 'splendid thing'. Context makes it clear you mean penis.
彼は立派なものを持っているらしい。
He's said to be well-endowed.
Direct translations like '大きい陰茎' (ōkii inkei) are overly clinical and rarely used outside medical texts. Stick to the options above for natural speech.
Words like 巨根 and デカチン are very casual and can be vulgar. Use 大きいペニス or euphemisms in polite conversation.
I heard he has a huge dick.
Very casual, somewhat vulgar slang. 'Deka' means huge, 'chin' is slang for penis.
あいつ、デカチンだって。
That guy's got a big dick, apparently.
Literally 'big dick'. Very direct and casual.
でかいちんこ見たことある？
Have you ever seen a big dick?
Abbreviation of 巨根 + チン (slang for penis). Used in manga or online.
巨チンキャラが人気だ。
Characters with huge dicks are popular.
More clinical term. 'Danseiki' means male genitalia.
大きな男性器は時に問題を引き起こす。
A large penis can sometimes cause problems.
A natural sentence pattern: 'penis is big'. Often used in descriptions.
彼氏はペニスが大きい。
My boyfriend has a big penis.
Literally 'the big one'. Vague but understood in context.
彼のは大きい方だね。
His is on the large side, huh.