About Hiroki Kosai
Lived 1933 – 2026 (aged 93). Hiroki Kosai was a Japanese astronomer.
+ Minor planets discovered: 93
Awards and honors Asteroid 3370 Kohsai, discovered by Karl Reinmuth at Heidelberg Observatory in 1930, is named in his honor.
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Important facts
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Contemporaries
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Frequently asked questions
Who was Hiroki Kosai?
Japanese astronomer (1933–2026)
When was Hiroki Kosai born?
Hiroki Kosai was born on 8 February 1933 in Kurashiki.
When did Hiroki Kosai die?
Hiroki Kosai died on 26 March 2026.
What was Hiroki Kosai's occupation?
Hiroki Kosai was an astronomer.
What nationality was Hiroki Kosai?
Hiroki Kosai was Japanese.
Sources & further reading
Cite this page
APA: Biography.guide. (2026). Hiroki Kosai. https://biography.guide/hiroki-kosai/
MLA: "Hiroki Kosai." Biography.guide, https://biography.guide/hiroki-kosai/.
Chicago: "Hiroki Kosai." Biography.guide. https://biography.guide/hiroki-kosai/.
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