Woo Jang-chun
agricultural scientist, botanist (1898-1959)

Woo Jang-chun (April 8, 1898 – August 10, 1959) was an agricultural scientist and botanist active in Japanese Korea and later in South Korea, famous for his discoveries in the genetics and breeding of plants.
Woo was born and raised in Japan, overcoming poverty and discrimination in Imperial Japan to become a prominent researcher and teacher. When Japanese rule over Korea ended in 1945, Woo left his mother, wife, and children in Japan and settled in what would become South Korea to lead the country's efforts in botany and agriculture. There is a memorial museum in the port city of Busan, where he lived and worked in Korea, honoring his life and accomplishments.
Woo is credited in scientific literature as Nagaharu U ( OO), a Japanese reading of the hanja of his Korean name; the pronunciation of his family name 禹 can be Romanized as U in both Japanese (う) and Korean (우).
Early life
Woo was born on April 8, 1898, in Akasaka, Tokyo and raised in Kure, Hiroshima, he was the first son of a Japanese mother, Naka Sakai (사카이 나카, 酒井ナカ) and a Korean father, Woo Beom-seon (禹範善, 우범선) of the Danyang Woo clan (본관: 단양 우씨, 丹陽 禹氏). Woo Beom-seon served as the commander of the first battalion of the Hullyeondae (a Japanese-trained Korean military force) during the late Joseon period and had sought political asylum in Japan. He was involved in the Gaehwapa movement (a modernization faction) and personally commanded the 2nd Battalion of the Hullyeondae Regiment, which attacked the Palace, and allowed the Japanese ronin to assassinate Empress Myeongseong in the Eulmi Incident, which also led to the murder of two other women on October 13, 1895. Fifty-five Japanese nationals were arrested and tried for involvement but won acquittal in a Japanese court due to lack of evidence. Meanwhile, Queen Min's son, Crown Prince Yi Cheok, accused Woo Beom-seon of complicity in the murders and he fled to Japan.
This brief starts where responsible research should: with the source description of “Woo Jang-chun” as agricultural scientist, botanist (1898-1959). Everything that follows is an evidence route, not borrowed authority.
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The subject matters to the people & ideas register because the source frames it as agricultural scientist, botanist (1898-1959). Its deeper value depends on whether names, dates, institutions and citations support that framing.
Chronology provides the most reliable spine for this subject; interpretation should follow only after identities and dates are secure. The source revision retrieved here is dated Aug 19, 2026. The linked authority identifier is Q489271. VIAF identifies the subject as 16192026. The Library of Congress control number is n85044628. 2 of 3 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank. The first chronological checks are 1898, 1959, 1945 and 1895.
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This entry incorporates text from “Woo Jang-chun” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.