Surname Nishioka (ニシオカ 
, Nishioka 
, 西岡 ) , worldwide, is quite a rare cognomen. The last name Nishioka is characteristic of Japan, where it is a rare surname, Brazil, and Denmark. In absolute terms, the name is most common in Brazil, the United States, and Japan. More prevalently, Nishioka is the forename as well as the last name.
| kojū nishioka (b. 1917) |
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| kumiko nishioka mathematician (b. 1954) |
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| toru nishioka (b. 1945) |
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| hironobu nishioka Japanese candidate (b. 1963) |
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| toshihiro nishioka Japanese rower, JP (b. 1971) |
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| yuichi nishioka researcher (ORCID 0000-0002-1956-3925) |
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| mami nishioka Japanese female curler, JP |
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| renato s nishioka researcher |
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| k. nishioka researcher |
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| kazue nishioka researcher (ORCID 0000-0002-5361-7843) |
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| shinta nishioka researcher |
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| yuichiro nishioka Japanese ichthyologist, JP |
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| masahiro nishioka researcher |
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| takanori nishioka researcher |
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| marcia nishioka researcher |
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