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Ichiro Oga

1883 – 1965

Japanese botany

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About Ichiro Oga

Lived 1883 – 1965 (aged 82). Ichiro Oga was a Japanese teacher.

Ichiro Oga (大賀一郎 Ōga Ichirō; 1883 – April 28, 1965), also known as Hasu Hakase (Dr. Lotus), was a Japanese paleobotanist famous for his work in discovering and reviving ancient lotus seeds.

Biography Oga attended Tokyo Imperial University. He graduated from college in 1909 and entered graduate school, majoring in plant cytology. Oga also began studying lotus. After graduation, he became a botanist in the South Manchuria Railway Zone and was a professor at the Education Institute of the South Manchuria Railway Company.

In 1917, Oga heard reports of ancient lotus seeds that had been unearthed by a farmer in Dalian. Deciding to investigate, he traveled to the peat beds of the Paozi Basin, the area where the lotus seeds were discovered. With the help of local farmer Liu Guai, Oga was able to collect over 7,000 specimens. The pair surmised that the lotus ecosystem had collapsed 400 years earlier. Although highly praised by Oga, Guai was executed for his collaboration with the Japanese at the end of Japanese occupation. However, the wood material found above the seeds were later dated to be over 3,000 years old. This called into question the original dating.

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Important facts

Birth century
Occupation
Education
University of Tokyo, Kanto Gakuin University, Tokyo Imperial University
Employers
Kanto Gakuin University, Tokyo Woman's Christian University, Tokyo University of Agriculture and Technology, Nagoya University

Contemporaries

People whose lives overlapped Ichiro Oga's

Frequently asked questions

Who was Ichiro Oga?

Japanese botany

When was Ichiro Oga born?

Ichiro Oga was born on 28 April 1883 in Okayama.

When did Ichiro Oga die?

Ichiro Oga died on 15 June 1965.

What was Ichiro Oga's occupation?

Ichiro Oga was a teacher.

What nationality was Ichiro Oga?

Ichiro Oga was Japanese.

Sources & further reading

· Wikipedia: Ichiro Oga

· Wikidata: Q11439235

· DBpedia: Ichiro Oga

Cite this page

APA: Biography.guide. (2026). Ichiro Oga. https://biography.guide/ichiro-oga/

MLA: "Ichiro Oga." Biography.guide, https://biography.guide/ichiro-oga/.

Chicago: "Ichiro Oga." Biography.guide. https://biography.guide/ichiro-oga/.

Data last updated: 2026-09-21 · Spot an error? Report a correction.

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