Taisho, Showa, and Heisei are all the reign names of the Japanese emperors

The Taisho period was a period of relative rise of pacifism in Japan before World War II

The early Showa period was The period when the war of aggression against China was launched

Heisei was really a period of peace, and there were a lot of dead houses in the country

So there were Meiji Yangshi, Taisho Yangguo, Showa ghosts, and Heisei Yang. What the Dolphins Say

As an active armed force, the Self-Defense Forces should be the most Showa-style, but they play the music of the Heisei Shitaku