Surname Hiroi (Hiroi 
, هيروا 
, Хирой 
) , around the globe, is a rare last name. The family name Hiroi is habitual in Brazil, where it is a very rare surname, Japan, and Germany, where it is an extremely rare surname. In absolute terms, it most frequently occurs in Brazil, Japan, and the United States. More frequently, Hiroi is the forename as well as the last name.
| takahiro hiroi researcher (ORCID 0000-0003-2866-9091) (b. 1960) |
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| junya hiroi researcher |
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| satoshi hiroi researcher ORCID 0000-0001-5058-6757 |
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| satoshi hiroi researcher (ORCID 0000-0001-9825-3425) |
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| noriko hiroi researcher ORCID ID = 0000-0002-0214-373X |
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| makoto hiroi researcher |
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| shinzo hiroi researcher |
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| yeun hiroi researcher |
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| takachika hiroi researcher (ORCID 0000-0002-8814-2657) |
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| yukio hiroi researcher |
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| noboru hiroi researcher |
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| zenji hiroi researcher |
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