Surname Ohtsuka (Ohtsuka 
) , globally, is a rare family name. The surname Ohtsuka is habitual in Hong Kong, where it is a rare surname, Japan, and Australia, where it is a very rare surname. Not in comparison with a country's population, this name is the most popular in Eastern Asia, particularly Japan, China, and Hong Kong. Likewise, Ohtsuka is the forename as well as the last name.
| makoto ohtsuka born:1922|died:2007|; 大津賀, 信, 1922-2007; Otsuka, Makoto 1922-; Ohtsuka, Makoto (b. 1922) |
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| akira ohtsuka researcher |
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| yoshikazu ohtsuka researcher |
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| mikio ohtsuka researcher |
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| toshihisa ohtsuka researcher (ORCID 0000-0002-1566-1325) |
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| toshiyuki ohtsuka researcher ORCID ID = 0000-0003-3554-8933 |
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| takashi ohtsuka researcher ORCID ID = 0000-0002-8039-9159 |
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| masato ohtsuka researcher |
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| toshiyuki ohtsuka researcher (ORCID 0000-0002-9032-7933) |
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| tatsuyuki ohtsuka researcher |
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| hideo ohtsuka researcher |
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| hokuto ohtsuka researcher |
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| yuhki ohtsuka researcher (ORCID 0000-0003-3275-3130) |
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| mayumi ohtsuka researcher |
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| masahisa ohtsuka researcher |
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