Korekiyo Otsuka

Who They Were

Korekiyo Otsuka (大塚惟精, Ōtsuka Isei) was a Japanese politician and career governor active from the 1920s into the final months of the Pacific War. He was born on 11 December 1884, during the Meiji period (1868–1912), in the 17th year of the Meiji era. Over roughly two decades he held the governorship of four prefectures, ending with Hiroshima Prefecture in 1945.

Otsuka died on 6 August 1945 in Hiroshima, killed in the atomic bombing of the city. He was 60 years old.

Life and Career

Otsuka’s career followed the standard path of a pre-war Home Ministry official: a series of prefectural governorships, each lasting a year or two. His first recorded post was governor of Tochigi Prefecture, which he held from 1924 to 1926. From there he moved to Fukuoka Prefecture, serving as governor from 1926 to 1927, and then to Ishikawa Prefecture, also in 1927.

After these three consecutive governorships, Otsuka’s career shifted to the national stage. He became a member of the House of Peers, the upper house of the Imperial Diet, whose members were appointed or hereditary rather than elected. The exact dates of his House of Peers service are not recorded in the available material.

His final appointment came in the spring of 1945. Otsuka was named governor of Hiroshima Prefecture in April 1945, at a point when the war had turned decisively against Japan. American air raids had already devastated many Japanese cities, and Hiroshima itself had so far escaped major bombing. Otsuka held the post for only two months, from April to June 1945.

On the morning of 6 August 1945, the United States dropped an atomic bomb on Hiroshima. Otsuka was in the city and was killed in the blast. His death came roughly five weeks before Japan’s formal surrender on 2 September 1945.

Why They Matter

Otsuka matters primarily for the circumstances of his death. He was the sitting governor of Hiroshima Prefecture when the first atomic bomb used in warfare was detonated over the city. As the highest-ranking civilian official in the prefecture, he was almost certainly at or near his official duties in the city centre when the bomb exploded. His death made him one of the most senior Japanese government officials killed in the attack.

His earlier career is less consequential. The governorships of Tochigi, Fukuoka, and Ishikawa were routine administrative posts in the interwar period, part of the standard rotation that the Home Ministry used to move officials across the country. His appointment to the House of Peers, however, marked him as a figure of some standing within the political establishment, since that body was reserved for distinguished bureaucrats, military officers, and nobles.

In the broader history of the atomic bombing, Otsuka’s death illustrates how the attack eliminated not only civilians and soldiers but also the local administrative leadership. Hiroshima’s prefectural government was effectively decapitated on 6 August, leaving recovery and relief efforts to be organised by surviving lower-ranking officials and outside help.

The Name in Japanese

The name is written 大塚惟精 in Japanese.

• Kana reading: おおつか いせい
• Romaji: Ōtsuka Isei

The family name comes first, as is standard in Japanese. It is 大塚 (Ōtsuka), and the given name is 惟精 (Isei).

Character by character:

• 大 (おお, ō) — “big” or “great.” This is the same character used in 大学 (だいがく, daigaku, “university”) and 大きい (おおきい, ōkii, “big”).
• 塚 (つか, tsuka) — “mound” or “hillock,” specifically a burial mound or small raised earth. Together, 大塚 means “big mound” and is a common Japanese surname and place name.
• 惟 (い, i) — “to think” or “to consider.” This character is relatively rare in modern everyday writing; it appears in classical and literary contexts, often with the sense of deep reflection.
• 精 (せい, sei) — “essence,” “spirit,” “refinement,” or “vitality.” It is the same character used in 精神 (せいしん, seishin, “mind” or “spirit”) and 精一杯 (せいいっぱい, seiippai, “with all one’s might”).

The given name 惟精 (Isei) thus carries a classical, scholarly flavour: roughly “one who thinks deeply about the essence of things.” The reading いせい (Isei) is a standard on’yomi (Chinese-derived) reading for both characters, rather than a native Japanese reading.

Note that the surname is sometimes romanised as “Otsuka” without the macron, but the long vowel in おお (ō) is significant: it distinguishes the name from 小塚 (Ko-zuka, “small mound”), which is a different surname.

Legacy

Otsuka’s legacy is almost entirely tied to his death in Hiroshima. He is remembered, where he is remembered at all, as the governor who perished in the atomic bombing. No major monuments or institutions bear his name, and his earlier administrative work left no lasting public footprint.

His fate, however, is part of the historical record of 6 August 1945. The fact that a sitting prefectural governor was killed in the blast is often cited in accounts of the bombing to show the scale of destruction: the attack did not spare even the highest levels of local government. Hiroshima’s city hall and prefectural offices stood near the bomb’s hypocenter, and many officials working there that morning died alongside Otsuka.

In the decades since, the names of the dead in Hiroshima have been commemorated collectively rather than individually. Otsuka appears in official casualty lists and in historical studies of the prefecture’s wartime administration, but he has not become a widely known figure in popular memory. His career before 1945 — the governorships, the House of Peers seat — is the standard biography of a competent, unremarkable Home Ministry official. It is the manner of his death that gives his name a fixed place in the history of the atomic bombing.