Adachi Yasumori (安達 泰盛) was a mid-Kamakura period samurai. A prominent gokenin of the Kamakura shogunate, he was the great-grandson of Adachi Morinaga, serving as a close aide to Minamoto no Yoritomo during his exile. He held the positions of shugo of Kōzuke and Higo, and was the third (eldest) son of Adachi Yoshikage.上田正昭, 津田秀夫, 永原慶二, 藤井松一, 藤原彰,『コンサイス日本人名辞典 第5版』, 株式会社三省堂, 2009, p. 41. During the Mongol invasions of Japan, his fleet participated in the raids against the Mongol forces during the Battle of Kōan.Stephen Turnbull (19 February 2013). The Mongol Invasions of Japan 1274 and 1281. Osprey Publishing. p. 67. . Retrieved 16 April 2013.
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