- Japanese:小田原城(Odawara-jou)
- Type:Flatland-Mountain
- Founder:Omori Yoriharu
- Year:15C
- Demolished:1871
- Reconstructed:1960,1971,1997(Mogi-tenshu,Gates)
- Location:Sagami province
The base of Odawara castle was a mansion of Kobawakawa clan in Kamakura period. The Kobayakawa was replaced by Omori Yoriharu in Muromachi period. Odawara castle was built on a mountain during the rule of Omori clan. 1495, Ise Shinkuro took over Odawara and the castle was expanded by the 5 generations of Hojo clan. The castle blocked invasions by Uesugi Kenshin(1561) and Takeda Shingen(1569).
In 1590, Toyotomi Hideyoshi mobilized 150000 troops to Odawara (Siege of Odawara). The siege took 100 days until finally Hojo Ujinao surrendered.
