| 05.1912 (KA) - during 05.1938 (RC) | Oyama[8] Nikichi | M3 Omidori Nikichi | Takasago | None | |
| during 05.1938 (OO) - after 01.1939 (OO) | Oyama | vacant | | | M3 Omidori Nikichi |
| after 01.1939 (KA) - after 05.1939 (KC) | Oyama[9] Seikichi | M4 Imizugawa Seikichi | Takasago | None | M3 Omidori Nikichi |
| after 05.1939 (KA) - 12.1939 (HB) | Oyama[10] Wataru | S Takanobori Wataru | Takasago | None | |
| 01.1940 (HB) - 19.01.1962 (PA) | Oyama[10] Wataru | S Takanobori Wataru | Oyama | Takasago | |
| 20.01.1962 (KC) - 21.04.1986 (PA) | Oyama[11] Shigeo | O Matsunobori Fukutaro | Oyama | Takasago | |
| 22.04.1986 (QQ) - 24.04.1986 (QQ) | Oyama | vacant | Oyama | Takasago | O Matsunobori Fukutaro |
| 25.04.1986 (HT) - 06.1986 (HS) | Oyama[12] Susumu | M2 Onobori Susumu | Oyama | Takasago | |
| 07.1986 (HS) - 27.12.2011 (HCa) | Oyama[12] Susumu | M2 Onobori Susumu | Takasago | Takasago | |
| 28.12.2011 (HCa) - 15.10.2017 (RM) | Oyama[12] Susumu | M2 Onobori Susumu | Azumazeki | Takasago | |
| 16.10.2017 (ES) - 31.01.2020 (HCa) | Oyama[12] Susumu | M2 Onobori Susumu | Azumazeki | Takasago | |
| 01.02.2020 (HCa) - | Oyama[12] Susumu | M2 Onobori Susumu | Hakkaku | Takasago | |