Ishikari River
After reaching adulthood, Abe was a governor of Koshi Province. In 658, he defeated the Mishihase in "Watarishima" (which may mean Tsugaru Peninsula or Hokkaido) at the request of the native inhabitants. His men continued to raid and plunder in Hokkaido and Okushiri Island until 660, bringing numerous trophies and prisoners to court. His trophies included at least 2 live bears, 70 bear hides, and 353 prisoners. In March 660, local allies asked for his military assistance at Ishikari River in Hokkaido, where he was victorious again.