Flag of Nagano Prefecture Japan - Color Changing Coffee Mug

The Flag of Nagano Prefecture, Japan, is a rectangular banner divided into two equal vertical sections by a central vertical line. The left section features three stylized maple leaves in white, while the right section displays a red sun with 16 rays (symbolizing the prefecture's position as the 16th to be established within Japan). This design represents the harmony between nature and the sun, symbolic of Nagano's rich natural resources and its historic significance as a site of the sun god Amaterasu in Japanese mythology. The flag was officially adopted on February 11, 1948.