| Native Name: | 豊國 範 |
| Toyokuni Susumu | |
| Birth Name: | Susumu Otsuka |
| Birth Date: | 1937 11, df=yes |
| Birth Place: | Nakatsu, Ōita, Japan |
| Weight: | 131kg (289lb) |
| Heya: | Tokitsukaze |
| Record: | 318-336-20 |
| Debut: | May, 1960 |
| Highestrank: | Komusubi (May, 1962) |
| Retireddate: | January, 1968 |
| Yushos: | 1 (Jūryō) 1 (Makushita) |
| Prizes: | Fighting Spirit (1) Technique (1) |
| Goldstars: | 7 Taihō (3) Sadanoyama (2) Kashiwado Tochinoumi |
| Update: | August 2012 |
Toyokuni Susumu (born 30 November 1937 as Susumu Otsuka) is a former sumo wrestler from Nakatsu, Ōita, Japan. He made his professional debut in May 1960, and reached the top division in November 1961. He earned seven gold stars against grand champion yokozuna in the course of his career. His highest rank was komusubi. He retired in January 1968.