Hachioji Castle was a large mountain castle located in what is now Hachioji City, the western part of Tokyo Metropolitan, the Kanto Region. In the late 16th Century during the Sengoku Period, the Hojo Clan owned most of the region. The clan was based in Odawara Castle located at the southwest corner of the region, while they built the network of branch castles in the region to maintain their territory. Hachioji Castle was one of the main branch castles for the clan.
The location of the castle
The castle was first built by Ujiteru Hojo at latest in 1584, replacing Takiyama Castle located about 10km northeast of Hachioji Castle. There were several reasons for the replacement, one of which was that the Hojo Clan wanted to have a much stronger castle. The tension between Hojo and the ruler, Hideyoshi Toyotomi was increasing at that time, so Hojo hurried to improve the castle. They put as much of their power and technology as they could into this castle.
The ruins of Takiyama Castle
Three Parts
Hachioji Castle consisted of three parts. The first one is called the Nekoya Area which was used for residences of retainers and craftsmen around the entrance of the castle. This area is alongside the Shiroyama River in a valley terrain.
The three parts (The diorama of the castle at the site, adding the comments)
The second part is called the Residence on the Foot Area where the Main Hall for the lord of the castle was built. This area is also alongside the river and the back of the Nekoya Area but was strictly protected. Visitors had to go across the river to enter the Main Gate, go the Main Route, and go across the river again over the Movable Bridge in front of the Main Hall. The bridge would be removed when a battle happened. The entrance of the hall was zigzagged, and its foundation was covered with terraced stone walls. The hall was made up of several buildings including the formal ones called “Shuden” or the Palace, and “Kaisho” or the Club. It also had a pond garden to host visitors. A lot of items such as utensils, weapons, and imported porcelains were found by the excavation.
The restored or developed Residence on the Foot Area
The last part is the Fortress on the Mountain Area which would be used when a battle happened. The Main Enclosure is on the 445m high top of the mountain (about 200m higher than the foot, which itself is a 200m above ground). Many other enclosures were built around the Main Enclosure and the ridges are used for the trails between the top and the foot of the mountain. In particular, lots of stone walls covered these enclosures and trails. In addition, not only the front of the Main Enclosure, but also the back of it was also protected strictly by small forts and ridges covered with stone walls. Such structures for a mountain castle were very rare, so the castle can be seen a completed version of mountain castles in Japan.
The ruins of the Fortress on the Mountain Area
Captured by Hideyoshi Toyotomi’s troop in One day
However, the castle was taken over by Hideyoshi’s troops in one day. On June 23, 1590, at least 35,000 soldiers attacked the castle, while the number of the defenders was only 3,000 including farmers and women. The lord, Ujiteru wasn’t there because he was at Odawara Castle. In addition, Hideyoshi ordered his troops to charge and capture the castle. The castle was too large for the 3,000 people to prevent from the bare-knuckled attack. There has been a sad story that many women threw themselves into the waterfall basin of the river before the castle fell.
The Portrait of Hideyoshi Toyotomi, attributed to Mitsunobu Kano, ownd by Kodaiji Temple (licensed under Public Domain via Wikimedia Commons)The waterfall of Go-Shuden (licensed by じゃんもどき via Wikimedia Commons)
The castle of the Chiba Clan, an illustrious clan in Kanto Region
Location and History
Chiba Clan built it in 15th Century
Motosakura Castle was a large castle which was located in Shimosa Province (what is now the northern part of Chiba Prefecture). A warlord, Suketane from the Chiba Clan, first built the castle at latest in 1484 on a hilly area called Masakado-yama. The area was surrounded by Inba-numa Lake, and only open to the Shimosa Road on flat land in the southern direction. This meant the area was defensive and convenient for water and land transport.
The map around the castle in the early Meiji Era, Inba-numa Lake was still near the castle
The Chiba Clan’s family crest, Gessei or Moon and Star (licensed by Los688 via Wikimedia Commons)
Central portion, Inner Compounds.
When the castle was first built, the warlords in the Kanto Region were split into two groups, the western group and the eastern group. The western group was led by the shogunal deputy for the Kanto Region, the Uesugi Clan, and the eastern group was led by the head of the Kanto government in Koga, the Ashikaga Clan. The Chiba Clan was included in the eastern group and the Motosakura Castle was also an important site which connected Koga in Shimosa Province to the other provinces in Boso Peninsula inside the group. The clan built several enclosures in the central portion of the castle called the Inner Compounds.
The location of the castle
The Main Enclosure called Shiro-yama had the Main Hall for the lord of the castle. The hall had a set of two formal buildings called Shuden and Kaisho, because the clan was the governor of the province. The Okuno-yama enclosure, which had the Myoken Shrine where the clan went for worship, is next to the main enclosure on the west. The Okuno-yama enclosure was connected to the Main Enclosure by a wooden bridge . The next one is the Kura-ato Enclosure which had warehouses. The westmost one is the Settei-yama Enclosure which was used for guesthouses. In addition to these enclosures, the Higashi-yama Enclosure was set to protect them, and the Tokoji-byo Enclosure, which had temples, faced Inba-numa Lake.
The enclosures of the Inner Compound (from the signboard at the site)
Outer Compounds were built against Satomi Clan
In the middle of the 16th Century, the situation of the Kanto Region changed. The Hojo Clan captured most of the region, then the Chiba Clan decided to support Hojo by adopting a son from them. However, the Satomi Clan in Boso Peninsula (the south of Honsakura Castle) was against Hojo. As a result, the Chiba Clan had to reinforce the defense of the castle on the south.
The location of Motosakura Castle and the home base of the Satomi Clan
The clan built large enclosures outside the Inner Compounds, called the Outer Compounds such as Araue, Negoya, and Mukai-Negoya. They were surrounded by thick earthen walls and had the sticking out defensive positions called Umadashi, which were built using Hojo’s techniques. In addition, the Settai-yama Enclosure became the pivot of the defense because it was the connecting point between the Inner Compounds and the Outer Compounds. The range of the castle finally reached 39,000 square meters.
The whole image of the castle including the Outer Compound (from the signboard at the site)
However, The Chiba Clan was fired by the ruler Hieyoshi Toyotomi in 1590, as their master Hojo Clan was also defeated by Hideyoshi. After that, Motosakura Castle was sometimes used by several clans. The castle was finally abandoned in 1615.
The Portrait of Hideyoshi Toyotomi, attributed to Mitsunobu Kano, ownd by Kodaiji Temple (licensed under Public Domain via Wikimedia Commons)
安東氏が最盛期のときの城
The castle when the Ando clan was its peak
立地と歴史～Location and History
舟運で繁栄した出羽国～Dewa Province Prospering by Ships
近代以前、大量輸送は船によって行われましたが、海上での航海は危険でした。船が十分発達していなかったからです。日本の場合、中世においては、商業船は主には太平洋ではなく、瀬戸内海や日本海などの内海を航行していました。そのため、当時は内海沿いの大きな港をもつ地域が繫栄しました。出羽国（現在の秋田、山形県を合わせた範囲）はそのような地域でした。 Before the Modern times, mass transportation was done by ships, but sailing on ocean could be dangerous because ships were not developed enough. In the case of Japan, in the Middle Ages, merchant ships sailed mainly on islands seas, such as the Seto Island Sea and the Japan Sea, not on the Pacific Ocean. For this reason, areas with a large port along the island seas prospered at that time. Dewa Province (combining what is now Akita and Yamagata Prefectures) was one such areas.
1860年代の日本古来の弁財船～Traditional Japanese junks in 1860s （licensed under Public Domain via Wikimedia Commons）
秋田で力をつけた安東氏～Ando Clan has power at Akita
安東氏は、北出羽（大体今の秋田県）を根拠地として海上交通を支配して大きな勢力となりました。戦国時代（日本中の地方大名が覇権をめぐって争った時代）には安東氏は、檜山安東氏と湊安東氏の２つのグループに分かれていました。檜山安東氏は北秋田にあった檜山城に住み、湊安東氏は南秋田にあった湊城を拠点としていました。 The Ando Clans had a great power to manage the marine transportation based in the north Dewa (roughly now Akita Prefecture). In the “Sengoku” Period- a period when local clans around Japan were fighting for control over all of the country- the Ando Clans was divided into two groups namely the Hiyama-Ando Clan and the Minato-Ando Clan. The Hiyama-Ando Clan lived in Hiyama Castle which was located on the northern part of Akita, while the Minato-Ando Clan lived in Minato Castle located on the southern part of Akita.
城の位置～The location of the castle
安東愛季は、最初は檜山安東氏の総領でしたが、湊安東氏に固有の跡継ぎがいなかったため、取り込むことに成功しました。彼は、秋田全域を統治することで最も有力な戦国大名の一人になったのです・ Chikasue Ando was at first the lord of the Hiyama-Ando, but was able to take over the Minato-Ando as it didn’t have its own successor. As a result, he ruled over the entire Akita and became known as one of the greatest warlords.
安東愛季の肖像画、東北大学附属図書館蔵～The portrait of Chikasue Ando, owned by Tohoku University Library （licensed under Public Domain via Wikimedia Commons）
愛季は1577年、彼の本拠地を檜山城と湊城の間にある城に移しました。彼が選んだ城が脇本城だったのです。この城は最初は１５世紀に築かれたと言われていますが、その後愛季が東日本では有数の規模の山城にまで拡張しました（約１５０ヘクタール）。この城は、男鹿半島の根元にある１００ｍの高さの丘の上に築かれ、重要な商業港であった土崎湊の近くでもありました。また、主要道路の「天下道」が城の中を通っているため、非常に戦略的な立地であり、城の領主は完全に交通を制御することができました。 Chikasue moved his home base to a castle located between Hiyama and Minato Castles in 1577. The castle that he chose was the Wakimoto Castle. The castle is said to be first built in the 15th century, then Chikasue developed the castle as one of the largest mountain castles in eastern Japan (about 150 hectare). The castle was located on a 100m high hill in the connecting part of Oga Peninsula, near an important trading port called Tsuchizaki-minato. This location proved to be very strategic as a main road called “Tenga-michi” ran between the two sides of the castle giving the Lord full control over transportation.
遺跡の全体図、現地案内板より～The whole map of the ruins, from the signboard at the site
愛季は支配者として絶頂期にあって、領土を拡張する一方、織田信長といった外の有力戦国大名とは手紙や贈り物により親交を深めました。ところが、1587年の戦いのさ中、彼は突然の病に倒れ、亡くなってしまいます。彼の息子、実季は湊城に住み、最終的には1602年に徳川幕府により関東地方に移されてしまいました。脇本城はそれから廃城となってしまったようです。 Chikasue was at the peak of his career as an administrator expanding his territory and building relationship with other great warlords such as Nobunaga Oda by sending letters and gifts. However, during a battle in 1587 he suddenly fell ill and died. His son, Sanesue lived in Minato Castle and was lastly transferred to Kanto Region by the Tokugawa Shogunate in 1602. Wakimoto Castle seemed to be abandoned since then.
安東実季木造、羽賀寺蔵～The wooden statue of Sanesue Ando, owned by Haga-ji Temple （licensed under Public Domain via Wikimedia Commons）
特徴～Features
城跡へ登っていく～Walking up to Castle Ruins
現在、脇本城跡は今もって非常に広大であり、５つの地区に分けられています。しかしながら、５つの地区全てが等しく整備されているわけではありません。そこで、私の訪問時には、一番整備されている「内館」１箇所を見学しました。ここは城の中心部分であり、現在はより整備されていて、観光客が訪れやすいようになっています。 Now, the ruins of Wakimoto Castle are still very large, and they are divided into five areas. However, not all the 5 areas have been developed equally. So, when I visited, I covered the one that was most developed which is “Uchidate”. This was the main portion of the castle, and now is further developed for tourists to visit easily.
城周辺の航空写真～The aerial photo of around the castle
城跡の入口は国道１０１号線沿いにあります。車で来られた方のために駐車場があります。そこから城跡への道を登っていく必要がありますが、それはかつてからある「天下道」の一部分です。更に進んで城跡の案内所を過ぎると、丘の頂上部分が見えてきます。 The entrance of the ruins is alongside National Route 101. You can park at a parking lot if you are driving. Then, you need to walk up the road to the ruins which was part of the old road, “Tenga-michi”. When you go farther passing through the guide house of the ruins, you will see the top of the hill.
城跡の入口～The entrance of the castle ruins残っている「天下道」～The remaining “Tenga-michi” road案内所を越えて頂上へ～Passing the guide house to the top
生鼻崎周辺～Around Oihana-saki Cape
基本的に、戦国時代の東日本では、城の基礎部分は土造りでした。城跡には建物はありませんが、土塁、空堀、虎口などが残っています。丘の頂上に登ってみると、左手（西の方角）には、海に突き出ている「生鼻崎」という岬の上にたくさんの曲輪があるのがわかります。それらの曲輪は岬の先端に向かって列を作って並んでいます。実はかつてはもっと多くの曲輪が岬と共に海に伸びていたのですが、江戸時代の地震のときに崩壊してしまいました。歴史家はこれらの曲輪は安東氏の家臣の屋敷地として使われたのではないかとしています。岬の先端では、日本海の荒々しい姿が見えます。 Basically, the foundations of the castles, in eastern Japan during the Sengoku Period, were made out of soil. The ruins have no buildings, instead they have earthen walls, dry moats, entrances, etc. When you climb on top of the hill, you will see a lot of enclosures on a cape called “Oibana-saki”, sticking out to the sea on the left on the west direction. You can see that these enclosures are in lines towards the top of the cape. In fact, there were many more enclosures with the cape spread to the sea in the past, but they collapsed when an earthquake happened in the Edo Period. Historians speculate that they were used for the Ando clan’s retainers’ houses. At the top of the cape, you can also have a wild view of the Japan Sea.
内館地区の地図、現地案内板に注記～The map of Uchidate Area, from the signboard at the site, adding notes岬に伸びる曲輪～The enclosures spreading to the cape生鼻崎周辺の想像図、現地案内板より～The imaginary drawing around Oibana-saki Cape, from the signboard at the site日本海の眺め～A view of the Japan Sea
城の中心部分～Center of Castle
道の反対側の東の方向には、空堀に囲まれたもっと大きな曲輪があります。この辺りが、城の中心地であったと考えられます。歴史家は、北側には別々の目的で作られた２つの建物があったと推定しています。一つは公式の儀式で使われた「主殿」という建物で、もう一つはお客をもてなす「会所」という建物です。 There are two larger enclosures surrounded by dry moats on the opposite side of the route on the east direction. They are supposed to be the center of the castle. Historians also speculate that two buildings on the northern side were used for other purposes. For example one of them was used as the building for the public ceremonies called “Shuden’ and the other for hosting the guests called “Kaisho”.
城の中心部分～The center of the castle空堀～The dry moat北側の曲輪～The north enclosure中心部の想像図、現地案内板より～The imaginary drawing around the center, from the signboard at the site
もう一つの南側の曲輪は高くて太い土塁に囲まれており、これもまたとても大きいものです。ここには城主の館があったと考えられています。愛季が住んでいたのでしょうか。この曲輪からは、海岸線とかつては城下町であった街並みの素晴らしい景色が望めます。 The other southern enclosure is surrounded by high thick earthen walls, and it is also very large one. This is thought to be used as the house of the lord. I wonder if Chikasue lived in it. From the enclosure, you can also have a great view of the coast line and the town which was once the castle town.
土塁に囲まれた南側の曲輪～The south enclosure surrounded by the earthen walls海岸線の景色～A view of the coast line
その後～Later History
江戸時代の1804年、有名な旅行家の菅江真澄が脇本城の城跡を訪れています。彼は日記に城跡のことを記録し、スケッチも残しました。1993年からは調査が行われており、この城が非常に大きな規模であったことがわかりました。そのため、城跡は2004年に国の史跡に指定されました。 In 1804 of the Edo Period, a famous traveler, Masumi Sugae visited the ruins of Wakimoto Castle. He recorded the ruins on his diary and left his sketches of them. Investigations have been done since 1993 and it was found out that the castle had a huge scale. Because of it, the ruins were designated as a National Historic Site in 2004.
菅江真澄の脇本城のスケッチ、現地案内板より～One of Sugae’s sketches for Wakimoto Castle, from the signboard at the site
私の感想～My Impression
私が脇本城跡に行ったときは、ひどい天気でした。更に「内館」地区しか行っていません。それでもこの城跡が大変な規模だということは言えます。もし晴れた日に十分時間が取れれば、もっと城跡を満喫できると思います。他の有名な城に比べてこの城の研究は始まったばかりです。この城から新たな発見がもたらされるのが楽しみです。 When I visited the ruins of Wakimoto Castle, the weather was very bad. In addition, I saw only one area called “Uchidate”, but I was able to witness the large scale of the ruins. If you have enough time to visit the ruins in a fine day, you can enjoy them more! I think the study for the castle have just started compared with other famous castles. I will be looking forward to seeing the new discovery from the castle.
岬側からの城跡の風景～A view of the castle ruins from the cape
ここに行くには～How to get There
車で行く場合：秋田自動車道昭和男鹿ICから約３０分かかります。城跡の入口に駐車場があります。 電車の場合、ＪＲ男鹿線脇本駅から城跡まで歩いて約３０分かかります。 東京から脇本駅まで：新幹線に乗り、秋田駅で男鹿線に乗り換えてください。 If you want to go there by car: It takes about 30 minutes from the Showa-Oga IC on Akita Expressway. There is a parking lot at the entrance of the ruins. By train, It takes about 30 minutes from Wakimoto Station on JR Oga line to the ruins on foot. From Tokyo to Wakimoto Station: Take the Shinkansen super express and transfer to Oga line at Akita Station.
リンク、参考情報～Links and References
・脇本城跡、男鹿市観光協会（Oga city tourism association） ・「日本の城改訂版第１５０号」デアゴスティーニジャパン（Japanese Book） ・「土崎港（秋田港）の「みなと文化」／渡辺英夫」（Japanese Paper）
