Gyokushin-ryū was a koryu

jujutsu Jujutsu ( , or ), also known as jiu-jitsu and ju-jitsu (both ), is a Japanese martial art and a system of close combat that can be used in a defensive or offensive manner to kill or subdue one or more weaponless or armed and armored opponent ...

style known for its extensive arsenal of sutemiwaza (sacrifice throws). It shared many techniques with

Daitō-ryū Aiki-jūjutsu , originally called , is a Japanese martial art that first became widely known in the early 20th century under the headmastership of Takeda Sōkaku. Takeda had extensive training in several martial arts (including Kashima Shinden Jikishinkage-ry� ...

. Yoseikan Budō partially descends from this style.

References

{{martialarts-stub Jujutsu Japanese martial arts