| Hiragana Image: | Japanese Hiragana kyokashotai SE.svg |
| Katakana Image: | Japanese Katakana kyokashotai SE.svg |
| Transliteration: | se |
| Transliteration Dakuten: | ze |
| Hiragana Manyogana: | 世 |
| Katakana Manyogana: | 世 |
| Other Manyogana: | 世 西 斉 勢 施 背 脊 迫 瀬 |
| Dakuten Manyogana: | 是 湍 |
| Spelling: | 世界のセ (Sekai no "se") |
せ, in hiragana, or セ in katakana, is one of the Japanese kana, each of which represents one mora. Both represent the sound pronounced as /[se]/, and when written with dakuten represent the sound [ze]. In the Ainu language, the katakana セ is sometimes written with a handakuten (which can be entered into a computer as either one character (セ゚) or two combined ones (セ゜) to represent the pronounced as /[t͡se]/ sound, and is interchangeable with ツェ (tse).
| Form | Rōmaji | Hiragana | Katakana |
|---|---|---|---|
| Normal s- (さ行 sa-gyō) | se | せ | セ |
| sei see sē | せい, せぃ せえ, せぇ せー | セイ, セィ セエ, セェ セー | |
| Addition dakuten z- (ざ行 za-gyō) | ze | ぜ | ゼ |
| zei zee zē | ぜい, ぜぃ ぜえ, ぜぇ ぜー | ゼイ, ゼィ ゼエ, ゼェ ゼー |