Astronomer

Hiroki Kosai

Japanese astronomer

1933 - 2026

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His biography is available in 20 different languages on Wikipedia (up from 19 in 2024). Hiroki Kosai is the 471st most popular astronomer (up from 481st in 2024), the 1,322nd most popular biography from Japan (up from 1,363rd in 2019) and the 6th most popular Japanese Astronomer.

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Hiroki Kosai is the most memorable of the 12 notable people born in Kurashiki, Japan, ahead of Kiichirō Furukawa, Naohito Fujiki, and Jinyu Nasu.

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Among Astronomers

Among astronomers, Hiroki Kosai ranks 471 out of 663. Before him are Joel Stebbins, Milorad B. Protić, Bohdan Paczyński, Audouin Dollfus, William Wilson Morgan, and Hugo Gyldén. After him are Carolyn Porco, Elia Millosevich, Minoru Honda, Pierre Puiseux, Edward Pigott, and Lyudmila Karachkina.

Most Popular Astronomers in Wikipedia

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Contemporaries

Among people born in 1933, Hiroki Kosai ranks 366. Before him are Maurinho, Miriam Stevenson, Nate Brooks, Reiner Kunze, Mark Forest, and Abdul Rahman Munif. After him are Mike Larrabee, Gino Pivatelli, Knut Johannesen, Georgi Burkov, Tatiana Doronina, and Wayne Rogers. Among people deceased in 2026, Hiroki Kosai ranks 200. Before him are Epeli Nailatikau, Yōhei Kōno, Robert Trivers, Ann Blyth, Robert Thurman, and Kazuo Imanishi. After him are Borislav Paravac, Ralph Towner, Boris Isachenko, Hans-Georg Reimann, Aleksandr Panayotov Aleksandrov, and Duane Michals.

Others Born in 1933

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Others Deceased in 2026

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In Japan

Among people born in Japan, Hiroki Kosai ranks 1,322 out of 6,943. Before him are Prince Fushimi Hiroyasu (1875), Sion Sono (1961), Kimiko Shiratori (1968), Haruko Sugimura (1909), Masahiro Akimoto (1979), and Momoe Yamaguchi (1959). After him are Eijun Kiyokumo (1950), Takayuki Kubota (1934), Kappei Yamaguchi (1965), Takako Doi (1928), Masafumi Terada (1994), and Minoru Honda (1913).

Others born in Japan

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Among Astronomers In Japan

Among astronomers born in Japan, Hiroki Kosai ranks 6. Before him are Takeshi Urata (1947), Tsutomu Seki (1930), Chushiro Hayashi (1920), Kiyotsugu Hirayama (1874), and Hisashi Kimura (1870). After him are Minoru Honda (1913), Kaoru Ikeya (1943), Okuro Oikawa (1896), Hiroshi Kaneda (1953), Yuji Hyakutake (1950), and Kiichirō Furukawa (1929).

Japanese born Astronomers

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