Amago Haruhisa (尼子 晴久; March 8, 1514 - January 9, 1562) was a powerful warlord in Chugoku region, Japan. He is the second son of Amago Masahisa. Initially named Akihisa (詮久), he changed his name to Haruhisa in 1541 after Ashikaga Yoshiharu offered a letter of kanji from his name.

His father, Amago Masahisa died early in a battle and on 1537, he became the head of Amago clan after his grandfather stepped down. He launched a series of ivnvasions to expand his domain going as far as Harima. But on 1540, the Siege of Koriyama against Mori Motonari ended in a humiliating defeat, and many of his retainers defected believing that Haruhisa's days are numbered. His grandfather Amago Tsunehisa died next year and Ouchi Yoshitaka launched a counter attack to finish the Amago clan. Haruhisa mangaged to stave off the invasion to encourage those retainers who had defected earlier and after gathering enough troop, managed to repel it. From this point, Haruhisa worked to secure his footing and control of such domains as Izumo, Hoki, Mimasaka, and Oki. When on 1551, Ouchi Yoshitaka was killed by Sue Harukata's rebellion, on 1552, Muromachi shogunate offered Haruhisa a lordship over eight domains including those four domain he already controlled fully.

On late years, Haruhisa suddenly decided to kill his uncle Amago Kunihisa as well as those retainers under him collectively called Shinguto(新宮党) from the town, Shingu they based their power which resulted in a serious shortage of battle proven leaders. While it is known largely from various fictions that emphasize Mori Motonari's prowess, that Motonari had Haruhisa kill to weaken his power, it is most likely that this was a move to solidify the Amago clan tighter under Haruhisa himself.

When Sue Harutaka lost against Mori Motonari dying in the Battle of Itsukushima, Haruhisa saw an opportunity to claim Iwami and making an alliance with Ogasawara clan of Iwami, moved to claim Omori Silver Mine. Motonari launched a counter attack and both clashed in a string of battles with no clear winner. Haruhisa collapsed in Gassan Toda Castle on 1560 while engaged in a battle against Motonari and died on January 9.

It is written in Unyo Gunjitsuki that Amago Hisayuki commented that Haruhisa is Quick to act lacking in the discipling of a general, quick to seek battle lacking in the forgiveness..

See also

• Amago Siki(in Japanese) (http://www.nx.sakura.ne.jp/~gumi/sengoku/amako/index.html) - A detailed site with a complete record of Amago clan.