[https://rekishinihon.com/2021/07/01/hikone-castle-japanese-national-treasure-since-1952/](https://rekishinihon.com/2021/07/01/hikone-castle-japanese-national-treasure-since-1952/)
https://www.reddit.com/r/japan/comments/133cl2a/hikone_castle_japanese_national_treasure/