ファイル:Kei gong in butterfly shape, excavated at Miyabuchi, Matsumoto-shi, Nagano, Japan, Heian period, dated 1001 AD, bronze - Tokyo National Museum - Tokyo, Japan - DSC08913.jpg
解説Kei gong in butterfly shape, excavated at Miyabuchi, Matsumoto-shi, Nagano, Japan, Heian period, dated 1001 AD, bronze - Tokyo National Museum - Tokyo, Japan - DSC08913.jpg
English: Exhibit in the Tokyo National Museum - Tokyo, Japan.