Odawara CastleOdawara City, Kanagawa Prefecture

Odawara Castle DATA
Other nameKomine Castle, Kobayakawa Castle
castle construction1417
addressJonai, Odawara City, Kanagawa Prefecture
telephone number0465-22-3818
Opening hours9:00-17:00 (Admission until 16:30)
closing dayDecember 31st - January 1st
Admission feeGeneral 510 yen / Elementary and junior high school students 200 yen
Access to Odawara Castle
10 minutes walk from JR Odawara Station/Odakyu Line Odawara Station

HISTORYOdawara Castle remains in history as the home of the Hojo clan.

Odawara Castle is the home of the Hojo clan and is also famous as the place where Toyotomi Hideyoshi and Hojo Ujimasa fought a fierce battle. After Tokugawa Ieyasu unified Japan, Odawara Castle became the domain office of the Odawara clan until the Meiji era. This time we will look back on the history of Odawara Castle.

Odawara Castle before becoming the residence of the Hojo clan
There is a theory that Odawara Castle began as the residence of Enpei Kobayakawa, said to be the founder of the Toi Kobayakawa clan, at the end of the Heian period. During the Kamakura period, Odawara was under the control of the Toi Kobayakawa clan, but in 1416, during the Uesugi Zenshu Rebellion, the Toi clan, the Zenshu side, fell from power, and the Omori clan, which was based in Suruga Province, seized the territory. I did.
After that, the Omori clan built a mountain castle on Mt. Hachiman (present-day hill near Odawara Prefectural High School). The official year the castle was built is unknown, but it is said to have been built in the middle of the 15th century.
Hojo Soun's robbery of Odawara Castle
In 1495, Hojo Soun, who ruled Izu Province, captured the mountain castle of Mt. Hachiman from Omori Fujiyori. According to one theory, Hojo Soun forged a friendly relationship with Fujiyori Omori to catch him off guard, then sent an army disguised as deer hunters to Odawara Castle and took over the castle.
Hojo Soun is said to have greatly expanded this mountain castle, but he continued to use Nirayama Castle as his residence throughout his life.
Odawara Castle after Hojo clan rule
Odawara Castle officially became the residence of the Odawara clan from the time of Hojo Ujitsuna, the son of Hojo Soun. From then on, Odawara Castle became the residence of the Hojo clan until Toyotomi Hideyoshi overthrew Ujimasa Hojo. It appears that the Odawara clan set up a mansion near the current Odawara Castle castle tower, and used Hachimanyama Castle, which they had taken from the Omori clan, as their final castle. Odawara Castle was also expanded by successive lords as the center of the Hojo clan's control of the Kanto region.
After Odawara Castle became the base of the Hojo clan, it was invaded by Uesugi Kenshin and Takeda Shingen. These include the siege of Odawara Castle by Uesugi Kenshin in 1561, and the invasion of Suruga by Takeda Shingen in 1568. Mr. Hojo defeated both of them after a fierce battle. There are also many records of major renovations to Odawara Castle from 1566 to 1569, and the Hojo clan strengthened the castle against the invasion of the Uesugi and Takeda armies. It is clear that they were prepared for this.
Toyotomi Hideyoshi's conquest of Odawara
A historically famous battle that took place at Odawara Castle is Toyotomi Hideyoshi's conquest of Odawara in 1590. This battle was waged by Toyotomi Hideyoshi against Ujimasa Hojo, who ruled the Kanto region, and his son Ujinao, as a finishing touch to the unification of Japan.In the end, the Hojo clan was defeated not only by Hideyoshi Toyotomi, but also by Yoshishige Satake, Kunitsuna Utsunomiya, and others. They also had to fight against the allied forces of the feudal lords who ruled the Kanto region.
In response to Toyotomi Hideyoshi's invasion, the Hojo clan surrounded the castle with a 9km-long fortification and defended itself. However, Hideyoshi cornered the Hojo clan by surrounding Odawara Castle with a large army of 150,000 men, and at the same time destroying each castle that had been ruled by the Hojo clan's subordinates. The Odawara Conquest ended about three months after the start of the war with the bloodless surrender of Odawara Castle. After the conquest of Odawara, Ujimasa committed seppuku, Ujinao took refuge on Mt. Koya, and the Hojo clan's rule over the Kanto region came to an end.
Odawara Castle in the Edo period
After the Odawara clan fell, the territory was given to Tokugawa Ieyasu. After the Battle of Sekigahara, Tokugawa Ieyasu, who was appointed Seii Taishogun and established the Edo Shogunate, entrusted the administration of Odawara to Tadayo Okubo, one of the 16 Tokugawa generals, and gave him 45,000 koku. This was the beginning of the Odawara domain. Odawara Castle had a huge structure built by the Hojo clan, but Tadayo Okubo discarded it and drastically reduced the size of the castle. In addition, Odawara Castle was destroyed when the Okubo clan was laid down, but it was rebuilt when the Inaba clan entered the castle. All of the remains of Odawara Castle that remain today date back to this time.
Odawara Castle was the residence of the lord of the Odawara clan throughout the Edo period, and continued to be a key location for the shogunate as a key point for the defense of the Kanto region in front of the Hakone checkpoint.
Odawara Castle after the Meiji period
Odawara Castle was abandoned in 1870, and many of its buildings were destroyed by 1872. On the site, the Odawara/Ashigara Prefectural Office and the Kanagawa Prefectural Branch Office were built, making it the center of city government. In 1901, an imperial residence was also built on the Ninomaru site. However, these buildings were severely damaged in the Great Kanto Earthquake of September 1923 and were demolished. In addition, the remaining stone walls collapsed during the Great Kanto Earthquake, and there is almost no trace of Odawara Castle from the Edo period.
Reconstruction of Odawara Castle
Odawara Castle lost all vestiges of the Edo period due to the demolition of buildings and the Great Kanto Earthquake, but starting with the rebuilding of the Sumiyagura in 1934, it was rebuilt in 1965. The castle tower was rebuilt in (1960). Furthermore, the Tokiwagi Gate was rebuilt in March 1971, the Copper Gate in October 1997, and the Umade Gate in March 2009, and Odawara Castle remains a symbol of Odawara City and a tourist attraction. It continues to be a famous place. In 1938, part of the Ninomaru and Sannomaru portions of the Odawara Castle ruins were designated as a national historic site, and in 1959, all of the parts that were not designated in 1948 were designated as national historic sites.
Modern Odawara Castle
Odawara Castle is now a castle park, and you can see the reconstructed castle tower, corner turret, Umade Gate, Copper Gate, and Tokiwagi Gate. The inside of the castle tower is a museum, as well as a history museum (NINJA hall), Tokiwagimon SAMURAI hall, and a museum shop, so you can enjoy learning about history. There is also an amusement park within the park, where you can enjoy a variety of flowers depending on the season.

Read about incidents related to Odawara Castle

Odawara conquestHideyoshi unifies the country! The last war that defeated the Hojo family
In 1590, Toyotomi Hideyoshi fought against the Hojo family led by Ujimasa Hojo and his son Ujinao in a series of battles known as the Odawara Conquest. The Hojo family, which had resisted Hideyoshi's rule until the end, was defeated in battle and destroyed, leaving Hideyoshi to rule the country.
Odawara conquest
Okubo Nagayasu IncidentAn embezzlement case in the early Edo period? Or a political change? What is the “Okubo Nagayasu Incident”?
Political factionalism is always present. However, now even if you lose, you won't lose your life. However, during the Edo period, there were cases where clans were destroyed as a result of losing the battle for power. One of them was Keicho 18 (1613).
Okubo Nagayasu Incident
Battle of KawanakajimaDestined rivals, Takeda Shingen and Uesugi Kenshin
Takeda Shingen and Uesugi Kenshin, mortal rivals from the Sengoku period. The battle in which these two warlords clashed was the ``Battle of Kawanakajima'' for control of Kita-Shinano (northern Nagano Prefecture). We fought five times over 12 years, but in the end, no settlement was reached.
Battle of Kawanakajima

Read biographies related to Odawara Castle

Ujiyasu HojoSagami lion
It was the middle of the Sengoku period, when many feudal lords fought against each other. In eastern Japan, rivals such as Echigo's Uesugi Kenshin, Kai's Takeda Shingen, and Suruga's Yoshimoto Imagawa competed for supremacy. And there is a daimyo in Izu who competed equally with these daimyo, Ujiyasu Hojo. Ujiyasu is
Ujiyasu Hojo
Hojo SounThe foundation of the 5th generation of the Gohojo clan
The period from the Onin War to the early Sengoku period was a time when the power of the shogunate declined and paid military commanders emerged from various regions. Hojo Soun traveled between the capital and the Kanto region. He became the foundation of the 5th generation of the Hojo, and served as a Shinjishu and Hōkōkan alongside the Ashikaga Shogun in the Shogunate.
Hojo Soun
Ujimasa HojoThe 4th generation that reached its peak
It is said that the Onin War was the beginning of the Sengoku period. During this period, the Hojo clan (also called the Gohojo clan to distinguish them from the regent Hojo clan of the Kamakura period) moved to the Kanto region and ruled. Ujimasa Hojo, the fourth generation successor, worked to expand his power.
Ujimasa Hojo
Tadanori OkuboA loyal vassal who supported the Tokugawa family and was replaced by Ieyasu.
During the Sengoku period, Odawara was ruled by the Hojo clan (also called the Gohojo clan to distinguish it from the Hojo clan, which was the regent of the Kamakura period). However, the Hojo clan was destroyed by Toyotomi Hideyoshi. After that, Mr. Okubo was put in charge of Odawara. Mr. Okubo is
Tadanori Okubo
Takeda ShingenKai Tiger raising the flag of Fuurinkazan
Throughout the Sengoku period, Tokugawa Ieyasu unified Japan and established the Edo shogunate. The person whom Ieyasu fought and lost, and whom he respected, was Harunobu Takeda of Kai (present-day Yamanashi Prefecture) (who later became a priest and took the name Takeda Shingen). Also, along with Ieyasu, Sengoku
Takeda Shingen
Naomasa IiIi's Red Demon
The period of war, which was called the Sengoku period after the history of China, was brought to an end by Tokugawa Ieyasu. Among the vassals who helped Tokugawa Ieyasu unify the country, four particularly powerful ones are called the Tokugawa Four. One of these four heavenly kings, the foundation of the Hikone clan
Naomasa Ii

History of the Odawara Domain, whose domain office is Odawara Castle

Odawara domainMany of the successive feudal lords served as the Shogunate.
Odawara was a land ruled by the Gohojo clan before the Edo period. In the Edo period, Tokugawa Ieyasu's confidante Tadayo Okubo was sealed off as the lord of the domain. Like other domains, the Odawara domain was ruled by multiple families, but basically the Okubo clan served as the lord until the Meiji era.
Odawara domain
Odawara Domain DATA
Domain officeOdawara Castle
old areaSagami country
stone height113,000 koku
main lordOkubo family, Abe family, Inaba family
Estimated population90,000 people (first year of the Meiji era)

With Tokugawa Ieyasu entering the Kanto region, Tadayo Okubo joined Odawara. After the Abe family and Inaba family, the Okubo family entered the domain again.

Odawara Castle column

Introduction column by castle enthusiasts

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