In the last part of the Age of Civil Wars, HOJO Ujiteru, a son of HOJO Ujiyasu of the load of Odawara Castle, build Hachioji Castle in the extensive mountain area as a protective fort of the west part of Kanto district. Toyotomi Hideyoshi has dispatched the troops of MAEDA Toshiie and UESUGI Kagekatsu for attacking Hachioji Castle in 1590. The castle put in fierce attack and as a result, it fell in only one day. Eventually, the Hojo ruined due to loss of the most important castle, which controlled the Kanto area. Thereafter, TOYOTOMI Hideyoshi has accomplished the ruling of whole country. After the elapse of 400 years, a part of the castle at the foot of Shiroyama and its ruin has been restored to its original state. There is another ruin of the desperate battle, which still has the ancient mood to remind us something at that time. From the lookout point of the top, Sagami-bay could be seen in far