| Word form | ichinichi |
| Original script | 一日 |
| LWT meaning(s) | |
| Word meaning | one day of 24 hours. when counting more days, -nichikan is used when more than ten days. |
| Analyzability | analyzable derived |
| Gloss | ichi-nichi one-day |
| Age | Old Japanese [21] (710–794) |
| Lexical stratum | kango |
| Year | 令義解(718) |
| Comparison with Mandarin | different term (Chinese) |
| Register | General |
| Numeric frequency | 0 |