This site has the wrong information.
'http://www.mofa.go.jp/policy/maritime/japan/index.html','http://www.mofa.go.jp/region/asia-paci/senkaku/index.html','http://www.mofa.go.jp/region/asia-paci/takeshima/index.html','http://www.mofa.go.jp/policy/maritime/japan/index.html' is a lie!
Takeshima's The official name is Dokdo. Dokdo is Korea territory.