Byakkotai Day

What Is Byakkotai Day?

Every August 23rd is "Byakkotai Day" (白虎隊の日, Byakkotai no Hi) in Japan. On the 23rd day of the 8th month of Keio 4 under the old lunar calendar (October 8, 1868, in the Western calendar), during the Boshin War — the civil war that brought about the Meiji Restoration — members of the Aizu domain's "Byakkotai" (白虎隊, "White Tiger Corps") retreated to Mount Iimori and took their own lives. They were 16 and 17 years old by the traditional Japanese count. Their story has become one of the most poignant and widely remembered tragedies of the Meiji Restoration era.

The Byakkotai: Youth Warriors of Aizu

The Byakkotai were a military unit of young samurai formed by the Aizu domain in 1868 to defend against the Imperial forces. Aizu was one of the most loyal domains to the Tokugawa Shogunate and resisted the new Meiji government's forces in the Boshin War. The Byakkotai were organized into units by rank; the "shi-chū niban-tai" (士中二番隊), whose tragedy is commemorated, was sent to the front at Tonokuchihara as the war turned against Aizu.

What Happened on Mount Iimori

Defeated at Tonokuchihara, the young fighters retreated to Mount Iimori overlooking Aizu-Wakamatsu. From there, they saw smoke and fire rising over the castle town. The popular account says they mistakenly concluded that Tsurugajō (the Aizu domain castle) had fallen. However, a memoir of survivor Iinuma Sadakichi found in 2008 records a heated debate over whether to return to the castle or charge the enemy, and some researchers now reject the "mistaken fall" story. Nineteen members died; Iinuma Sadakichi was rescued and revived. He later worked as a telegraph engineer and lived until 1931, and his testimony is the main source for what happened on the mountain.

The Byakkotai in Japanese Memory

The Byakkotai story became one of the most powerful narratives of loyalty, youthful idealism, and tragic sacrifice in Japanese cultural memory. The "graves of the nineteen" on Mount Iimori in Aizu-Wakamatsu, Fukushima Prefecture, were erected in 1890 and became a pilgrimage site. Memorial ceremonies are held at the graves every year on April 24 and September 24. The story was taught in prewar schools as an example of samurai loyalty; in the postwar era, it has been revisited as a meditation on the tragedy of young lives consumed by adult conflicts over power.

Fun Facts

• Italian connection: A monument to the Byakkotai was gifted by Italy in 1928 — a stone column excavated from ancient Pompeii. It stands near the Byakkotai graves and remains historically controversial because of its link to Mussolini's government.
• Most survived: Although the Mount Iimori suicides are famous, more than 80 percent of all Byakkotai members survived the war and lived on into the Meiji era.
• Tsurugajō: The Aizu castle (Tsurugajō) actually held out for about another month. The castle was demolished after the war but reconstructed in 1965 and is now a popular historical tourist site.