Ryusai
| Ryūsai | |
|---|---|
 | |
| Name in Kanji | 龍斎 |
| Name in Romaji | Ryūsai |
| Alternate spelling(s) | 龍齋 |
| Fighting Style | Hokuto Shinken |
| Family | Kenshiro Kasumi (descendant) |
| Position(s) | Successor of Hokuto Shinken |
| Appearances | Souten no Ken ch. 241 |
- Ryūsai (龍斎) was the Hokuto Shinken successor during the Sengoku period, circa 1582 AD. He was present at the Honnō-ji Incident with Oda Nobunaga.