Sister castle

A sister castle or twin castle relationship is the castle equivalent of sister city, between two geographically distinct castles, usually by agreement between two local governments famous for castles.

Some Japanese castles establish sister relationships with not only domestic castles but also European castles.

Details

On 26 March 2015, Conwy Castle in Wales was twinned with Himeji Castle. Both castles are World Heritage Sites.

The term friendship castle alliance (友好城郭) is also used, but it is distinguished from sister castle(姉妹城) like the examples of Himeji Castle and Osaka castle.^{[citation needed]}

List of sister castles and friend castles


	Sister castle relationship(姉妹城)
	Friendship castle alliance(友好城郭)

Date		Distinction		Distinction
1966, 15 August	Hikone Castle	National Treasure National Special Historic Site of Japan	Takamatsu Castle	Important Cultural Property National Historic Site of Japan National Place of Scenic Beauty
1983, 29 April	Nagahama Castle	-	Osaka Castle	Important Cultural Property National Special Historic Site of Japan
1985, 2 November	Osaka Castle	Important Cultural Property National Special Historic Site of Japan	Wakayama Castle	Important Cultural Property National Historic Site of Japan National Place of Scenic Beauty
1989, 2 November	Marksburg	World Heritage Site	Maruoka Castle	Important Cultural Property
1989, 11 May	Château de Chantilly	Monument historique	Himeji Castle	World Heritage Site National Treasure National Special Historic Site of Japan
2006, 10 October	Osaka Castle	Important Cultural Property National Special Historic Site of Japan	Ueda Castle	National Historic Site of Japan
2009, 2 October	Schloss Eggenberg	World Heritage Site	Osaka Castle	National Historic Site of Japan Special Historic Sites
2015, 26 March	Himeji Castle	World Heritage Site National Treasure National Special Historic Site of Japan	Neuschwanstein Castle	World Heritage Site
2017, 11 April	Château des ducs de Bretagne	Monument historique	Osaka Castle	Important Cultural Property National Special Historic Site of Japan
2019, 29 October	Conwy Castle	World Heritage Site Listed building-Grade 1	Himeji Castle	World Heritage Site National Treasure National Special Historic Site of Japan
2022, 3 October	Osaka Castle	Important Cultural Property National Special Historic Site of Japan	Castello Sforzesco	-
2024, 16 October	Himeji Castle	World Heritage Site National Treasure National Special Historic Site of Japan	Wawel Castle	World Heritage Site Historic Monument of Poland
2025, 24 May	Himeji Castle	World Heritage Site National Treasure National Special Historic Site of Japan	Schönbrunn Palace	World Heritage Site
2026, 1 April	Matsumoto Castle	National Treasure National Historic Site of Japan	Château de Chambord	World Heritage Site