The Three Heroes of Tokugawa refer to three famous daimyo in the Edo period of Japan, namely Tokugawa Ieyasu, Tokugawa Hidetada, and Tokugawa Ienmitsu. They played a very important role in Japanese history and had a far-reaching impact on Japan's politics, economy, and culture.

However, there has been a long-standing controversy about why Sakakibara Yasushi did not become one of the Three Heroes of Tokugawa. Sakakibara Yasushi was a military commander during the Warring States period of Japan. He once served under Oda Nobunaga, Toyotomi Hideyoshi, and Toyotomi Hideyori, the son of Hideyoshi, and later served under Tokugawa Ieyasu. He performed well in wars and was known as the "Best Warrior in the World," but he was not listed as one of the Three Heroes of Tokugawa.

Firstly, it is important to clarify that the selection criteria for the Three Heroes of Tokugawa were very strict. They must possess certain political wisdom, military skills, and leadership abilities, as well as extensive networks and social support. Although Sakakibara Yasushi was an outstanding military commander, his political performance was not particularly outstanding. He had served Oda Nobunaga and Toyotomi Hideyoshi, but did not demonstrate much political talent under the governance of Tokugawa Ieyasu. Additionally, his networks and social support were relatively limited, making it difficult for him to obtain the title of one of the Three Heroes of Tokugawa.

Secondly, the selection of the Three Heroes of Tokugawa was also influenced by the historical background. In the Edo period, Tokugawa Ieyasu was the supreme ruler of Japan, and his power and status far exceeded other daimyo. Therefore, the selection criteria for the Three Heroes of Tokugawa were correspondingly more stringent and lofty. Under this historical background, Sakakibara Yasushi's political talent and social support were not sufficient to make him one of the Three Heroes of Tokugawa.

In conclusion, although Sakakibara Yasushi was an outstanding military commander, he was not listed as one of the Three Heroes of Tokugawa due to his lack of political talent and social support, as well as the influence of the historical background. However, Sakakibara Yasushi remains an important figure in Japanese history, and his military achievements and contributions have been widely recognized and respected.

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