Cognomen Iinuma (Iinuma 
) , in the world, is a rare last name. The surname Iinuma is habitual in Japan, where it is a very rare surname, the United States, and Brazil. Also, Iinuma is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Iinuma | Brazil, Japan, France, United States, China |
| tomohisa iinuma researcher |
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| yoshiteru iinuma researcher |
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| takeshi iinuma researcher |
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| toshimitsu iinuma researcher |
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| masataka iinuma researcher ORCID ID = 0000-0002-8843-7471 |
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| hisae iinuma researcher |
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| munekazu iinuma |
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