Mori Museum occupies the former residence of the Mori clan, one of western Japan's great samurai families. The collection includes clan treasures, with several pieces ranked as National Treasures, so this is more than a local house museum.
The setting is part of the pleasure: formal rooms, garden views, and objects that connect Yamaguchi's quiet present with its feudal weight. It is a strong stop if you are interested in samurai history without the crowds of Japan's better-known castle towns.