The Shakujii village area was led by the Toshima clan from the end of the Heian Period. It is likely they had some kind of fortification on this site much earlier, but a proper castle was built around the mid to late 1400's as they attempted to solidify their holdings in response to a build up of power by the Ogigayatsu Uesugi at Kawagoe Castle, Iwatsuki Castle and Edo Castle. A 1476 alliance with Nagao Kageharu put the Toshima in the crosshairs of the Ogigayatsu and their top retainer Ota Dokan. Toshima Yasutsune led forces from Shakujii Castle and Nerima Castle against Ota Dokan who had attacked Yasutsune's brother Yasuaki at Hiratsuka Castle. Yasutsune lost the battle on the field of Ekoda Numabukuro. Yasukai was killed at this battle and as a condition of surrender, Yasutsune was supposed to destroy Shakujii Castle, but he did not. Ota Dokan then attacked the castle and Toshima fled to Hiratsuka Castle. When Hiratsuka Castle next fell to Ota Dokan, Yasutsune fled to Kozukue Castle. When Kozukue Castle fell to Ota Dokan Yasutsune disappeared and the Toshima clan came to an end.
The castle remains are fenced off and only open around Culture Day each year.
|English Name||Shakujii Castle|
|Year Founded||late 1400's|
|Castle Condition||Ruins only|
|Historical Period||Pre Edo Period|
|Access||Shakujii Koen Sta (Seibu Ikebukuro Line), 20 min walk|
|Visitor Information||The park seems to be open any time, but the castle remains are fenced off and only open around Culture Day each year.|
|Time Required||30 mins|
|Coordinates||35° 44' 13.24" N, 139° 35' 47.65" E|
|Visits||November 3, 2015|
|Added to Jcastle||2015|