| Akasaka Yakuro Masatsune | |
| Native Name: | 赤坂 弥九郎 政雅 |
| Native Name Lang: | ja |
| Other Names: | Zenkitsu, Zenkichi (善吉) |
| Birth Name: | Akasaka Yakuro Masatsune |
| Birth Date: | 1567 |
| Death Date: | 1594 |
| Martial Art: | Kenjutsu Iaijutsu |
| Style: | Tenshinsho Jigen Ryu |
| Teacher: | Kaneko Shinkuro Morisada |
| Students: | Togo Shigekata |
Akasaka Yakuro Masatsune (赤坂 弥九郎 政雅, 1567–1594) was a direct student of Kaneko Shinkuro Morisada, the second headmaster of the Tenshinsho Jigen Ryu.[1] Akasaka is better known by his Buddhist dharma name- Zenkitsu (善吉, also read Zenkichi). He was the chief priest at the Buddhist temple Tenneiji of the Soto Zen School, located not far from Kuramadera near Kyoto.[1]
Zenkitsu later succeeded Kaneko in becoming the third headmaster (soke) of the Tenshinsho Jigen Ryu.[2] His best student was a samurai from the Satsuma domain, Togo Shigekata, whom he taught between 1588-1589.[1] In less than a year, Shigekata would master the Tenshinsho Jigen Ryu and synthesize it with the Taisha Ryu to create the Jigen Ryu.[3]
Zenkitsu died in c. 1594.