| Word form | yuiitsu |
| Original script | 唯一 |
| LWT meaning(s) | |
| Word meaning | Also means “unique” |
| Comments on word | Variants include yuitsu (1891), yuiichi (平家 bf.13th century). Present form attested in 1905. |
| Analyzability | analyzable compound |
| Gloss | yui-itsu only-one |
| Age | Middle Japanese [21] (1185–1603) |
| Lexical stratum | kango |
| Year | 平家（bf.13th century) |
| Register | General |
| Numeric frequency | 50.1 |