| Man’yō Name | Pisi 菱（ ひし） |
| Modern Name | Hishi 菱（ヒシ） |
| English Names | Water chestnut; water caltrop |
| Scientific Name | F. Lythraceae Trapa Japonica |
| Distribution | Hokkaido, Honshu, Shikoku, Kyushu |
| Appearance | |
| Seasonal Association |
Poems (2)
| MYS VII: 1249 MYS XVI: 3876 |