was an armed struggle between the Ainu and Wajin that took place on the

Oshima Peninsula The Oshima Peninsula (渡島半島 ''Oshima-hantō'') is the southernmost part of Hokkaidō, the northernmost of the Japanese islands. Where the peninsula starts is open to interpretation. A more generous interpretation is to draw a line southea ...

of southern

Hokkaidō is the second-largest island of Japan and comprises the largest and northernmost prefecture, making up its own region. The Tsugaru Strait separates Hokkaidō from Honshu; the two islands are connected by railway via the Seikan Tunnel. The ...

, Japan, in 1457. Escalating out of a dispute over the purchase of a sword, Koshamain and his followers sacked , before being overcome by superior forces under

Takeda Nobuhiro Takeda Nobuhiro (武田信広), also known as Kakizaki Nobuhiro (蠣崎信廣) (1431 – 1494) was the ancestor of the Matsumae clan, and is celebrated for his role in suppressing the 1457 Ainu revolt of Koshamain. The adopted son of Takeda ...

. The principal record of the conflict is '' Shinra no Kiroku''.

References

Ainu history Military history of Hokkaido Conflicts in 1457 1450s in Japan 1457 in Asia Attacks on military installations in Japan Military history of feudal Japan Looting in Asia Wars involving Japan {{Japan-history-stub

See also

References