Tokyo National Museum
The Tokyo National Museum is the oldest institution of its kinds in Japan, founded in 1872. The museum is comprised of 6 exhibition buildings, which are Honkan (Japanese Gallery), Toyokan (Asian Gallery), the Gallery of Horyuji Treasures, Heiseikan: Japanese Archaeology and Special Exhibits, Hyokeikan, and Kuroda Memorial Hall.
It's said to be the oldest museum in Japan.
I was lucky enough to see a national treasure from the Jingo-ji Temple on display!