Koriyama Castle 1540 - River Enokawu

Early in 1540, Akihisa, leader of the Amako, proposed a full-scale invasion against the Mori. Before attacking the capital city of Mori, as an advance force, he sent the troops of Amako Kunihisa, of the Shinguto clan, via the Bingo …

1540-06-01

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Early in 1540, Akihisa, leader of the Amako, proposed a full-scale invasion against the Mori. Before attacking the capital city of Mori, as an advance force, he sent the troops of Amako Kunihisa, of the Shinguto clan, via the Bingo pass to take the castle of Mori loyalists, the Shishido. Kunihisa moved quickly into Yoshida, but when his troops reached the River Enokawu, it was so bravely defended by the Shishido, that he was forced to give up and he returned to Izumo.

Yoshida, Aki Province, Japan

By the end of the 1530s, Mōri Motonari had cut ties with the Amago clan (also known as Amago) and realigned himself with the Ōuchi. Taking advantage of the growing weakness of the Takeda clan of Aki, Motonari grew ever more powerful in Aki Province. By 1540, the old lord of the Amago, Tsunehisa had nominally retired and turned over the leadership of the clan to his grandson, Haruhisa (also known as Akihisa.) In that year Amago Haruhisa conceived of a plan to destroy Mōri Motonari and bring Aki province under the sway of the Amago. When a council of the Amago retainers was called to discuss the planned campaign, almost all spoke in favor of the attack. Amago Hisayuki, however, considered the risks to be too great and spoke out against it, but was derided by Tsunehisa as a coward and publicly humiliated. Hisayuki was given the task of engaging the Mōri's ally, the Shishido clan in Aki as part of an initial and concurrent operation of the larger Amago campaign into Aki.

Wikipedia: Siege of Koriyama

Shishido

Shinguto