Tokyo National Museum
This four-building complex is one of the world's great repositories of East Asian art and archaeology, with some 87,000 objects in its permanent collection and several thousand more on loan from shrines, temples, and private owners. The Hyokeikan, a Western-style building with bronze cupolas that was built in 1909, was once devoted to archaeological finds but is now open to the public only for special exhibitions. The larger Heiseikan, behind the Hyokeikan, was built to commemorate the wedding of crown prince Naruhito in 1993 and now houses Japanese archaeological exhibits. The second floor is used for special exhibitions.
In 1878 the 7th-century Horyu-ji (Horyu Temple) in Nara presented 319 works of art in its possession—sculpture, scrolls, masks, and other objects—to the imperial household. These were transferred to the National Museum in 2000 and now reside in the Horyu-ji Homotsukan (Gallery of Horyu-ji Treasures), which was designed by Yoshio Taniguchi. There's a useful guide to the collection in English, and the exhibits are well explained. Don't miss the hall of carved wooden gigaku (Buddhist processional) masks.
The central building in the complex, the 1937 Honkan, houses Japanese art exclusively: paintings, calligraphy, sculpture, textiles, ceramics, swords, and armor. Also here are 84 objects designated by the government as National Treasures. The more attractive Toyokan, to the right of the Honkan, was completed in 1968 and recently renovated; it is devoted to the art and antiquities of China, Korea, Southeast Asia, India, the Middle East, and Egypt.