What's new

Castle Ishiwaki Castle

This article is in the series Walking the Japanese Castles
Leave a rating
Ishiwaki Castle (石脇城 Ishiwaki-jō) was a small, flat mountain castle (平山城 hirayamajiro) about two kilometres northeast of Yaizu Station. Usually, we would pass a castle of this size, but there is a theory that Ishiwaki Castle was Hōjō Sōun's first castle.

Ishiwaki Castle (石脇城)

Sōun (then known as Ise Shinkurō, 伊勢新九郎) is said to have first become lord of Kōkokuji Castle in the first year of the Chōkyō era (1487). However, according to the Suruga-ki (駿河記) written in the Edo period (1603-1868), Imagawa Yoshitada (今川義忠) sent Sōun to live in Ishiwaki during the Bunmei era (文明年間, 1469-1486). At that time, he was still an unknown man. According to conventional history, he started his life as a rōnin and lived to be 88 years old, but contemporary sources claim that he was from the prestigious Ise clan and died at age 64.

Ishiwaki Castle is surrounded by high mountains, one of them Mount Takakusa (高草山). It is interesting to note that the castle was built on a small hill despite the proximity of those mountains.

Ishiwaki Castle (石脇城)

Aerial photographs taken from Geographical Survey Institute maps. The location of the enclosures is estimated.

Despite its small size, the castle consisted of three kuruwa (曲輪).

Ishiwaki Castle (石脇城)

We took the bus from Yaizu Station. The bus stop is at the south exit (I waited at the north exit for a long time and missed one of the buses, which were even less frequent. However, I could spend some time at the footbath in front of the station).

Finally, we get on the bus and off in front of Higashi Mashizu Elementary School. Incidentally, Tanaka Castle was located at the compound of Nishi-Mashizu Elementary School. The area around Yaizu and Fujieda used to be under the jurisdiction of Mashizu County (益津郡).

This is the entrance to the road that leads up the hill. There does not appear to be any parking nearby, but a relatively large shoulder area is to the east of the entrance.

Ishiwaki Castle (石脇城)

The boundary is unclear, but on the left is the third kuruwa and on the right is the second.

Ishiwaki Castle (石脇城)

The stone wall is probably from recent days. The castle is relatively small but surrounded by cliffs and is in a very strategic location.

Ishiwaki Castle (石脇城)

This is the second kuruwa.

Ishiwaki Castle (石脇城)

The first kuruwa is on slightly higher ground at the back of this photo.

Ishiwaki Castle (石脇城)

The first kuruwa now houses the Dainichi-dō (大日堂).

Ishiwaki Castle (石脇城)

We found what appeared to be earthworks behind Dainichi-dō.

Ishiwaki Castle (石脇城)

Date of visit: 17 February 2014


  • Address: 636 Ishiwakikami, Yaizu, Shizuoka 425-0015
  • Access: a 30-minute walk from Yaizu Station on the JR Tōkaidō Main Line, or by bus, in front of Higashi-Masuzu Elementary School;
    3 kilometres from Tomei Expressway Yaizu Interchange via Prefectural Route 150
Next article in the series 'Walking the Japanese Castles': Hanazawa Castle
Previous article in the series 'Walking the Japanese Castles': Tanaka Castle (Shizuoka)
About author
Hiroto Uehara
Hiroto is an ordinary Japanese office worker, but his true mission is searching for castles on the weekend.


There are no comments to display.

Series table of contents

Iwatsuki Castle Shakujii Castle Oda Castle Tsuchiura Castle Miharu Castle Inohana Castle Setagaya Castle Konodai Castle Usui Castle Sakura Castle Kozukue Castle Masugata Castle Koga Castle Tenjinyama Castle Ogura Castle Sugaya Castle Sugiyama Castle Kogane Castle Kokokuji Castle Nagahama Castle (Izu) Nirayama Castle Hachigata Castle Futagamiyama Castle Edo Castle Kawahara Castle Kageishi Castle Wakasa-Onigajo Castle Tenjinyama Castle (Tottori) Tsuzurao Castle Ueshi Castle Jindaiji Castle Kururi Castle Mariyatsu Castle Narukami Castle Ryozen Castle Kori-Nishiyama Castle Tsutsujigasaki Residence Yogai Castle Kofu Castle Iwadono Castle Hachioji Castle Takiyama Castle Suemori Castle Nagoya Castle Inuyama Castle Kiyosu Castle Tatebayashi Castle Karasawayama Castle Sano Castle Ueda Castle Sanada Residence Sanada Honjo Toishi Castle Katsurao Castle Uchiyama Castle Hiraga Clan Castle Taguchi Castle Tatsuoka Castle Komoro Castle Matsushiro Castle Kajiki Castle Kakuto Castle Hitoyoshi Castle Ichiuji Castle Izaku Castle Chiran Castle Kiyoshiki Castle Kamo Castle Miyakono Castle Obi Castle Shibushi Castle Koyama Castle Mukasa Castle Sadowara Castle Tonokoori Castle Taka Castle Nerima Castle Kawagoe Castle Ashikaga Residence Koizumi Castle Kanayama Castle Shinagawa Battery (Odaiba) Tamba Kameyama Castle Yagi Castle Sonobe Castle Fushimi Castle Yodo Castle Shoryuji Castle Yamazaki Castle Tsukui Castle Katakura Castle Hirayama Castle Site Park Yamanaka Castle Sanuki Castle Sunpu Castle Koyama Castle (Shizuoka) Ryugenzan Castle Sagara Castle Tanaka Castle (Shizuoka) Ishiwaki Castle Hanazawa Castle Mochifune Castle Moriyama Castle (Aichi) Obata Castle (Aichi) Ryusenji Castle Gakuden Castle Komakiyama Castle Iwakura Castle (Aichi) Kano Castle Gifu Castle Kitagata Castle

Article information

Hiroto Uehara
Article read time
2 min read
Last update
〒425-0015 静岡県焼津市石脇上636

More in Shizuoka

More from Hiroto Uehara

Top Bottom