鶴丸国永

Tsurumaru's name derives from the crane-circle crest on its mountings. The crane, a symbol of longevity in Japanese culture, mirrors the sword's own survival across a millennium — truly embodying the saying 'a crane lives a thousand years.' In the Kamakura period, Hōjō Sadatoki is said to have seized it as spoils from the Adachi clan during the Shimotsuki Incident. After passing through many warriors' hands, it was presented to the Imperial Household in the Meiji era. In Touken Ranbu, Tsurumaru is depicted as a carefree figure in white robes and became one of the game's most beloved characters, creating a cultural phenomenon where exhibitions of the actual sword drew enormous queues.