| Tochio Castle | |
| Nativename-A: | Japanese: 栃尾城 |
| Location: | Nagaoka, Niigata, Japan |
| Type: | Mountaintop castle |
| Ownership: | Uesugi clan |
| Condition: | ruins |
| Built: | 15C |
| Builder: | ? |
| Demolished: | 1610 |
| Past Commanders: | Uesugi Kenshin, Honjō Saneyori, Honjō Hidetsuna |
| Events: | Siege of Tochio Siege of Otate |
was a castle structure in Nagaoka, Niigata, Japan.[1] The site is located on a 227-meter mountain.[2] Young Uesugi Kenshin spent five years in the castle.[3] [4]
The exact date of the castle's foundation is unknown but built in the Muromachi period. In 1543, Uesugi Kenshin left Kasugayama Castle and entered the castle as a joint commander by Nagao Harukage`s order.[4]
In 1544, Kenshin made his first battle against local lords opposed to the Nagao clan in the castle and broke the siege.[5]
In 1548, Kenshin returned to Kasugayama Castle as a feudal lord of the Nagao clan.[6] The castle is now only ruins, with some earthenwalls, well and moats.[4] Its ruins have been protected as a Prefectural Historic Site.[4]