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1874 births
1943 deaths
University of Tokyo alumni
20th-century Japanese astronomers
Scientists from Sendai
19th-century Japanese astronomers

Kiyotsugu Hirayama: page information

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Page ID841495

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Words280

OriginImported

CreatedJun 19, 2026, 8:19 AM

UpdatedJun 19, 2026, 8:19 AM