| Word form | otōsan |
| Original script | お父さん |
| LWT meaning(s) | |
| Comments on word | old form toto, attested in 17th century. Present form attested in 19th century. |
| Analyzability | semi-analyzable |
| Gloss | o-tō-san HON-father-HON |
| Age | Early Modern Japanese [21] (1604–1867) |
| Lexical stratum | wago |
| Year | 17th century |
| Register | General |