The Japanese government is nominating Hikone Castle in Shiga Prefecture for registration as a Cultural World Heritage site. It is one of the twelve original castles in Japan and is already designated a national treasure. Himeji Castle in Hyogo Prefecture already holds the Cultural World Heritage designation.
Information from J-Castle website:
For his participation in the Battle of Sekigahara, Ii Naomasa was awarded the lands surrounding Sawayama Castle. Due to its inconvenient location and poor condition, he soon started planning for a new castle on a new location that would become Hikone Castle.
Unfortunately, Naomasa died soon after and the castle was actually begun under his son Naotsugu. It took 20 years and was completed under Naotsugu's brother Naotaka who had become lord of the castle in 1615. The main keep of Hikone-jo is famous for having used several types of gables and construction techniques to make it well fortified. The main keep and connected yagura are designated National Treasures. The Ii family maintained their rule over Hikone Castle for over 250 years from the beginning of the Edo Period until the Meiji restoration.

































