|English Name||Nagakubo Castle|
|Castle Condition||Ruins only|
|Historical Period|| Pre Edo Period
|Access||Nagaizumi Nameri Sta (Gotenba Line), 16 min walk|
|Visitor Information||Park is open any time, there are no signs indicating the castle remains.|
|Time Required||20 mins|
|Location||Nagaizumi, Shizuoka Prefecture|
|Coordinates||35° 8' 54", 138° 53' 23"|
|Visits||June 20, 2014|
There are a few different theories about the early history of this castle, but they all indicate that a castle or fort could be found on this site back to the Kamakura Period. In 1537, Hojo Ujitsuna made use of some of the pre-existing earthworks to rebuild a new castle as the Hojo looked to extend their domain into the Sunto region. Nagakubo Castle would become one of the hot spots of battles between the Hojo, Imagawa and Takeda clans. In 1545, Imagawa Yoshimoto with help from the Takeda and Uesugi took Nagakubo castle. In 1568 the Hojo took the castle back again from Takeda Shingen who was controlling the castle at that time. A truce was made between the Hojo and Takeda in 1571 and the castle passed back to Takeda hands where it would remain until the end of the Takeda clan in 1582. From that point the castle was under the control of Tokugawa Ieyasu. Matsudaira Ietada fortified and enlarged the castle and it was used as an offensive base by Ieyasu against the Hojo for the siege of Odawara. The castle was abandoned in 1600 when the then lord Nakamura Kazuuji was moved to Yonago.
Unfortunately the history of the castle is much more exciting than a visit to this site. The only remains are a few earthen embankments which you can barely make out. Much of the castle has been developed over and even the hillside has been excavated for a road. The extant earthworks you see are of the Hachiman and Minami baileys.