Last name Koshiba (コシバ 
, Koshiba 
, Косиба 
) , globally, is a rare surname. The cognomen Koshiba is characteristic of Belgium, where it is a rare surname, Kyrgyzstan, and Japan, where it is a very rare surname. Measured by absolute frequency, it is the most numerous in Japan, Brazil, and the United States. More prevalently, Koshiba is the forename as well as the last name.
| h. t. koshiba American photographer, JP (b. 1873) |
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| tsuneori koshiba (b. 1921) |
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| joshua koshiba Palauan politician, PW (b. 1943) |
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| luiz koshiba (b. 1945) |
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| kenji koshiba Japanese amateur wrestler, JP (b. 1972) |
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| peoria koshiba female sprinter from Palau, PW (b. 1979) |
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| junichiro koshiba researcher (ORCID 0000-0002-9627-6292) |
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| t. koshiba researcher |
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| takeshi koshiba researcher |
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| yusuke koshiba researcher ORCID ID = 0000-0003-3448-1458 |
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| seizo koshiba researcher |
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| takumi koshiba researcher |
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