1553: First Battle of Kawanakajima
Takeda Harunobu and Nagao Kagetora confronted each other at Kawanakajima over control of northern Shinano. The conflict between the Kai and Echigo powers then became prolonged.
Events this year
Month 2
Promulgation of Kana Mokuroku Addendum
Imagawa Yoshimoto promulgated twenty-one additional articles and litigation rules supplementing his father Ujichika's Kana Mokuroku, establishing the legal foundation for domain governance.
Month 7
First Battle of Kawanakajima
Takeda Harunobu and Nagao Kagetora confronted each other at Kawanakajima over control of northern Shinano.
See this battle in detail →Sources 長野市「川中島古戦場史跡公園」／ながの観光net「川中島の戦い 史跡ガイド」
Month unknown
Miyoshi Nagayoshi establishes himself at Akakawa Mountain Castle
Miyoshi Nagayoshi made Akakawa Mountain Castle in Settsu his base of operations. No official documentation specifying the exact date has been found.
Sources 大阪府「三好長慶ゆかりの地」