With the exception of certain castles constructed around the end of the Sengoku Period or in the Edo period, such as Himeji-jo castle and Matsumoto-jo castle (both of which still exist and have been designated as world heritage sites and national treasures), as well as Osaka-jo castle, Edo-jo castle, or Nagoya-jo castle (which are well known symbols of the history of the city by people of a wide range of ages), the majority of the castles that were constructed or used in the Sengoku Period are not well known.
戦国時代に築城あるいは使用された大部分の城は、戦国時代末期から江戸時代にかけて築城された、現存の姫路城や松本城のように世界遺産や国宝に指定されたり、あるいは大坂城、江戸城、名古屋城のように、都市の歴史の象徴として、広い年齢層の人々があまねく一般知識として認知するまで敷衍されてはいない。