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- Tahara Castle, Tahara, Aichi
- Taka Castle, Matsuzaka, Mie
- Takada Castle, Jōetsu, Niigata
- Takamatsu Castle, Takamatsu, Kagawa
- Takamori Castle, Takamori, Higashi, Usa
- Takaoka Castle, Takaoka, Toyama
- Takasaki Castle, Takasaki, Gunma
- Takashima Castle, Suwa, Nagano
- Takatenjin Castle, Kakegawa, Shizuoka
- Takatori Castle, Takatori, Nara
- Takayama Castle, Takayama, Gifu
- Takeda Castle, Asago, Hyōgo
- Takenoya Castle, Gamagori, Aichi
- Taki-no-jō Castle, Tokorozawa, Saitama
- Tamanawa Castle, Kamakura, Kanagawa
- Tanaka Castle, Fujieda, Shizuoka
- Tatebayashi Castle, Tatebayashi, Gunma
- Tateyama Castle, Tateyama, Chiba
- Tatsuno Castle, Tatsuno, Hyōgo
- Tobiyama Castle, Utsunomiya, Tochigi
- Tokushima Castle, Tokushima, Tokushima
- Tomioka Castle, Reihoku, Kumamoto
- Tomo Castle, Fukuyama, Hiroshima
- Tottori Castle, Tottori, Tottori
- Toyama Castle, Toyama, Toyama
- Tsu Castle, Tsu, Mie
- Tsuchiura Castle, Tsuchiura, Ibaraki
- Tsuruga Castle, Tsuruga, Fukui
- Tsurumaru Castle, Kagoshima, Kagoshima
- Tsutsujigasakiyakate, Kōfu, Yamanashi
- Tsuwano Castle, Tsuwano, Shimane
- Tsuyama Castle, Tsuyama, Okayama
Read more about this topic: List Of Castles In Japan