A Genroku grappling master
Shibukawa-ryū (渋川流) is a school of classical Japanese jūjutsu opened by Shibukawa Bangorō Yoshikata (渋川伴五郎義方, 1652–1704), one of the celebrated grappling teachers of Genroku-era Edo. The school descends from the Sekiguchi-ryū tradition of yawara, and Bangorō's teaching made him famous enough in his own lifetime that his name passed into Edo popular storytelling as a byword for a strongman-grappler, a rare kind of celebrity for a jūjutsu teacher in Japan.
What the school contains
At its core Shibukawa-ryū is an unarmed art of throws, joint locks, pins and escapes. Depending on the branch, however, the school is broader than empty hands alone: several lines transmit iai, sword work and other weapon methods alongside the grappling, reflecting the Edo-period expectation that a jūjutsu tradition should prepare its students for armed as well as unarmed encounters.
Yielding as method: a small art of joints and balance that let the weaker party decide the outcome.
The road to Hiroshima
The school spread from Edo along several teacher lines during the eighteenth and nineteenth centuries. The line that proved most durable took root in the Hiroshima domain, where it was taught to retainers and townsmen and survived the Meiji-era collapse that ended so many jūjutsu schools. That Hiroshima transmission continues today, and it is through it that Shibukawa-ryū is demonstrated at classical martial arts events in modern Japan, still presented as a living inheritance of Bangorō's Edo teaching.