Visit Izumo Taisha Shrine, one of Japan's most sacred shrines, and Matsue Castle, a national treasure, explore traditional tea ceremony culture at a historic teahouse, and stay overnight at a lakeside inn on Lake Shinji. Izumo Taisha (出雲大社) - This is one of Japan's most famous and oldest Shinto shrines, but its cultural and spiritual significance might not be immediately clear to international visitors.