Great Bear sword or Seven Stars Sword,  The sword contains a gold inlay of clouds and seven stars forming the Great Bear constellation. According to a document at Shitennō-ji, this sword was owned by Prince Shōtoku., Asuka period, 7th century , 62.1 cm (24.4 in) Osaka Shitennō-ji, Osaka, Japan
Association of Cultural Properties
1955-03-30
Portfolio of National tresures Volume 2nd,  Association of Cultural Properties, Tokyo, 1955-03-30