Family name Iwaya (Iwaya 
) , in the world, is a rare last name. The last name Iwaya is habitual in Peru, where it is a very rare surname, Japan, and Brazil. In absolute terms, it most frequently occurs in Japan, Brazil, and Indonesia. Likewise, Iwaya is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Iwaya | Japan, China, Indonesia, Nigeria, Brazil |
| motoaki iwaya researcher |
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| leonardo h iwaya researcher ORCID ID = 0000-0001-9005-0543 |
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| yugo iwaya researcher |
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| yuka iwaya researcher (ORCID 0000-0002-1764-027X) |
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| katsuya iwaya researcher ORCID ID = 0000-0003-4973-6687 |
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| hiromichi iwaya researcher (ORCID 0000-0002-9827-2500) |
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| takeaki iwaya original name: IWAYA Takeaki, country: JPN, gender: male, date of birth: 1986 (b. 1986) |
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| kazuhiro iwaya |
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