Sakura Army Regiment Site (National Museum of Japanese History)

The Sakura Army Regiment Site occupies the grounds of the former Sakura Castle (佐倉城址) in Sakura City, Chiba Prefecture, approximately 60 kilometers east of Tokyo. For roughly 70 years spanning the Meiji, Taisho, and Showa periods, Sakura served as a critical military garrison defending the approaches to the capital.

The Infantry 2nd Regiment (歩兵第2連隊) was formed in 1874, the year from which the Sakura garrison is usually dated; according to the regimental chronology its headquarters was first placed at Utsunomiya and moved to Sakura in 1884. The regiment participated in major conflicts including the Satsuma Rebellion, the First Sino-Japanese War, and the Russo-Japanese War. In 1908 the 2nd Regiment relocated to Mito, and in March 1909 the Infantry 57th Regiment (歩兵第57連隊) was transferred from Narashino to take its place at the Sakura garrison.

The 57th Regiment, part of the elite 1st Division of the Imperial Japanese Army, saw extensive service during the Second Sino-Japanese War and World War II. In 1944, the regiment was deployed to the Philippines to defend against the Allied advance. During the Battle of Leyte (October 1944 – March 1945), the 1st Division was committed to fierce combat against American and Filipino forces. The division suffered catastrophic losses, with only approximately 800 of the more than 10,000 soldiers it took to Leyte remaining when it moved to Cebu Island in January 1945, where they continued fighting until the end of the war.

After Japan's defeat in 1945, the military installations at Sakura were decommissioned. The site was subsequently chosen as the location for the National Museum of Japanese History (国立歴史民俗博物館, commonly known as Rekihaku), which was formally established in 1981 and opened to the public in March 1983. Designed by architect Yoshinobu Ashihara, the museum covers approximately 35,500 square meters of floor space on a 130,000-square-meter site and is one of Japan's premier national museums, featuring six permanent exhibition galleries covering Japanese history from prehistory to the modern era.

Despite the transformation into a museum campus, the site retains significant physical traces of its military past. The former garrison gates (営門), ammunition storage facilities, and other military structures remain standing on the grounds. The adjacent Sakura Castle Ruins Park preserves the castle moats and earthworks that once defined both the feudal and military eras of this historically layered site.