Chiba Prefecture contains the administrative territorial entity Kisarazu
Modern period
Chiba Prefecture was established on June 15, 1873, with the merger of Kisarazu Prefecture and Inba Prefecture. The 1923 Great Kantō earthquake caused widespread destruction in Chiba Prefecture, most notably in the southernmost part of the Boso Peninsula, where 1,300 residents were killed. Areas of the prefecture adjacent to Tokyo saw much damage, and mob violence against Koreans and other ethnic minorities occurred in the chaos after the earthquake in Funabashi, Ichikawa, and other areas. Koreans, in several neighborhoods of Yachiyo, were killed, and a tower was erected in 1972 near Yachiyodai Station to memorialize those killed in the incident. The militarization of Chiba Prefecture dates to the Russo-Japanese War (1904–1905). Coastal fortifications were built along Tokyo Bay, as far south as Tateyama, to protect the capital of the Japanese Empire from attack. In the 1930s, the north and central areas of the prefecture became a center of large-scale military production, and military bases and fortifications were constructed in most of the coastal areas of the prefecture. After the United States took control of Saipan, the northern part of the prefecture (most notably the cities of Chiba and Chōshi) was firebombed. Much of the industrialized north of the prefecture was destroyed. Operation Coronet, one of two parts of Operation Downfall, was the planned land invasion of Tokyo in March 1946 by the United States. Coronet planned Kujūkuri Beach as one of two initial landing bases, the other being Hiratsuka via Sagami Bay. The U.S. First Army would enter at Kujūkuri, sweep across the Boso Peninsula, and meet the U.S. Eighth Army at Tokyo. The plan was not carried out since Japan surrendered after the atomic bombings of Hiroshima and Nagasaki.
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