The origin of this character is uncertain. It might have been a needle, used phonetically for ten, or it might have represented a counting stick or knotted rope (also used for counting).
Vocabulary
| Vocabulary | Reading | Meaning | |
|---|---|---|---|
| ⭐ | 十 | じゅう/とお | ten |
| 十日 | とおか | tenth day of the month; ten days | |
| 十一日 | じゅういちにち | eleventh day of the month; eleven days | |
| 十二日 | じゅうににち | twelfth day of the month; twelve days | |
| 十四日 | じゅうよっか | fourteenth day of the month; fourteen days | |
| 二十日 | はつか | twentieth day of the month; twenty days | |
| 三十日 | さんじゅうにち | thirtieth day of the month; thirty days | |
| 十月 | じゅうがつ | October | |
| 十一月 | じゅういちがつ | November | |
| 十二月 | じゅうにがつ | December | |
| 四十七士 | しじゅうしちし | the 47 ronin | |
| 十字架 | じゅうじか | cross (e.g. Christian) | |
| 十文字 | じゅうもかんじ | cross (shape) | |
| 十回 | じっかい/じゅっかい | ten times | |
| 十色 | といろ | ten colors | |
| 十重 | とえ | tenfold | |
| 十重二十重 | とえはたえ | multitude | |
| 二十歳 | はたち | twenty years old | |
| 五十音 | ごじゅうおん | fifty sounds, the Japanese syllabary |