Siege of Hachigata
1568 CE.
Shown on the map at 36.109°, 139.196°.
The first siege of Hachigata castle took place in 1568; Takeda Shingen laid siege to Hachigata Castle, which was controlled by Hōjō Ujikuni, but was unable to capture it. After failing to capture Hachigata Castle, Shingen then moved south to besiege Takiyama Castle, on his way to the Hōjō capital of Odawara.
Text from the Wikipedia article Siege of Hachigata (1568), licensed CC BY-SA 4.0.