was an armed struggle between the Ainu and Wajin that took place on the Oshima Peninsula of southern Hokkaidō, 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. 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