Full name : Kiyotsugu Hirayama
Country: Japan
Occupation : Astronomer
Birth year: 1874
Death Year : 1943 (69 years old)
Known as: Japanese astronomer
Full name : Kiyotsugu Hirayama
Country: Japan
Occupation : Astronomer
Birth year: 1874
Death Year : 1943 (69 years old)
Known as: Japanese astronomer
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