Kogon Ryūga

Ryūga Cave ,  kuma aka sani da kogon Ryuga   ko kogon Ryugado,  wani kogon dutse ne da ke cikin birnin Kami, a lardin Kōchi, a ƙasar Japan .  Yana ɗaya daga cikin manyan kogon dutsen ƙasa uku a Japan,  tare da jimlar tsawon kilomita 4.  An sanya kogon a matsayin abin tarihi na kasa na Japan . 

 Dubawa 
Kogon ya ɗauki kimanin shekaru miliyan 175 don kafa shi. 

An gano misalai da dama na tukwane na Yayoi, ragowar murhu, gawayi, da kasusuwan dabbobi a cikin kogon, wanda ke nuni da cewa mutane na rayuwa a cikin kogon a zamanin Yayoi kimanin shekaru 2,000 da suka wuce. Don haka, an sanya kogon a matsayin Gidan Tarihi na Ƙasa a cikin 1934. 

An bude kogon ga jama'a a watan Agustan 1931; Kimanin yanki mai nisan kilomita ɗaya shine kogon nuni tare da haskakawa, matakan hawa da alamun hanyoyi. 

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 Manazarta