• http://ja.wcontology.org/resource/Category:日本の元号 ( describe )
  • http://www.w3.org/2002/07/owl#sameAs ( describe )
    • http://en.wcontology.org/resource/Category:Japanese_eras
    • http://ja.dbpedia.org/resource/Category:日本の元号
  • http://wcontology.org/core#addConstraint ( describe )
    • http://ja.wcontology.org/resource/Category:元号
  • http://www.w3.org/1992/02/22-rdf-syntax-ns#type ( describe )
    • http://wcontology.org/core#constrainedSetCategory
  • http://wcontology.org/core#narrower ( describe )
    • http://ja.wcontology.org/resource/Category:日本の皇室
    • http://ja.wcontology.org/resource/Category:日本の紀年法
    • http://ja.wcontology.org/resource/Category:日本の時間
  • http://www.w3.org/ns/prov#wasDerivedFrom ( describe )
    • http://ja.wikipedia.org/wiki/Category:日本の元号?oldid=58836985