[1] 草薙剣盗難事件 - Wikipedia (2017-03-26 00:17:29 +09:00) <https://ja.wikipedia.org/wiki/%E8%8D%89%E8%96%99%E5%89%A3%E7%9B%97%E9%9B%A3%E4%BA%8B%E4%BB%B6>

[2] 天叢雲剣 - Wikipedia (2017-03-31 20:47:59 +09:00) <https://ja.wikipedia.org/wiki/%E5%A4%A9%E5%8F%A2%E9%9B%B2%E5%89%A3>