圖片來源
https://zh.wikipedia.org/wiki/%E9%87%91%E6%BE%A421%E4%B8%96%E7%B4%80%E7%BE%8E%E8%A1%93%E9%A4%A8
https://www.kanazawa21.jp/data_list.php?g=11&d=1&lng=e
https://kinarino.jp/cat8-%E6%97%85%E8%A1%8C%E3%83%BB%E3%81%8A%E5%87%BA%E3%81%8B%E3%81%91/1666-%E3%82%82%E3%81%86%E8%A1%8C%E3%81%A3%E3%81%9F%EF%BC%9F%E3%82%A2%E3%83%BC%E3%83%88%E3%81%AE%E9%9B%86%E3%81%BE%E3%82%8B%E9%87%91%E6%B2%A221%E4%B8%96%E7%B4%80%E7%BE%8E%E8%A1%93%E9%A4%A8%E3%81%AE%E9%AD%85%E5%8A%9B%E3%82%92%E7%B4%B9%E4%BB%8B%E2%99%AA
http://witch5653.pixnet.net/blog/post/38827833-%E6%97%A5%E6%9C%AC%E5%BB%BA%E7%AF%89%E3%80%8B%E6%9C%AA%E5%B3%BB%E5%B7%A5%E5%B0%B1%E7%8D%B2%E7%8D%8E%EF%BC%81%E5%A6%B9%E5%B3%B6%E5%92%8C%E4%B8%96%E7%9A%84%E7%B6%93%E5%85%B8%E4%B9%8B
http://forgemind.net/phpbb/viewtopic.php?t=5726
https://www.asahiglassplaza.net/gp-pro/column/designfiles/case1/gaiyo.htm