Rikishi Profile
Basic Information
＜Retired＞
| Sadanoryu | |
| Stable | Sakaigawa |
|---|---|
| Name | Koki Yamamoto |
| Ring Name | Obamaumi → Sadanoryu |
| Highest Rank | Makushita #33 |
| Birthday | August 10, 1990 |
| Birthplace | Nagasaki |
| Height | 178.0cm |
| Weight | 125.3kg |
| Signature Maneuver | |
| Retire | September, 2021 |