- Otousan (おとうさん)
- Catalog Number
- Tendou Kazumi - Otousan (おとうさん; Father)
- Saotome Ranma (both female and male forms) - China Kara no Tegami (チャイナからの手紙; A Letter from China)
- Otousan (Original Karaoke)
- China Kara no Tegami (Original Karaoke)
- Jusenkyoubata Kaigiroku Sono 6 (呪泉郷端会議録その6)
"Otousan" is a special Ranma 1/2 single. The single was released on the same day as whole string of Ranma singles: "Characters' Christmas", "Miwaku no Limbo Dance", "November Rain", and "Omoide ga Ippai".
The single did not chart on the Oricon weekly charts.