Lieutenant-General
* 27th of February 1878
† 9th of May 1951
(若山善太郎)
(わかやま ぜんたろう)
| 1917-05-02 | Lieutenant-Colonel |
| 1920-08-10 | Colonel |
| 1924-12-15 | Major-General |
| 1930-08-01 | Lieutenant-General |
| 1917-05-02 | – | 1918-08-19 | Instructor at the Army Artillery Engineering School |
| 1917-05-02 | – | 1917-12-25 | Instructor at the War College |
| 1918-08-19 | – | 1921-06-28 | Commanding Officer Imperial Guards Engineer Battalion |
| 1921-06-28 | – | 1923-04-21 | Chief of Instruction Section, Army Engineering School |
| 1923-04-21 | – | 1923-10-15 | Chief of Staff, 19th Division |
| 1923-10-15 | – | 1924-12-15 | Chief of Engineers Branch, Military Service Bureau, Ministry of War |
| 1924-12-15 | – | 1929-08-01 | Commandant of the Army Engineering School |
| 1929-08-01 | – | 1932-01-09 | Inspector of Engineers |
| 1932-01-09 | – | 1935-03-15 | General Officer Commanding 3rd Division |
| 1935-03-15 | – | 1935-08-01 | Attached to the General Staff |
| 1935-08-01 | – | 1935-08-28 | In reserve |
| 1935-08-28 | Retired |