Echizen Ono Castle
Echizen Ono Castle has a stone wall  (石垣, ishigaki) which is a wall or fence made by assembling stones, with a construction method called Nozura-zumi (野面積み), which is an old style stone wall piled up without processing natural stone. Nozura-zumi has a good drainage, which are resistant to weathering. This is nowadays a valuable historic site.