In the world, Ippei (Ippei 
, イッペイ , いっぺい) is a rare boy's first name. The first name Ippei is characteristic of Eastern Asia, particularly Japan, where it is a rare male name, and China, where it is an extremely rare masculine name. Much more prevalently, Ippei is the last name as well as the forename.
| VARIANT | COUNTRY |
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| Ippei | Singapore, Hong Kong, Japan, United States, China |
| イッペイ | Japan |
| ippei tanaka (b. 1882) |
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| ippei shimamura Japanese anthropologist (born 1969) (b. 1969) |
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| ippei kamae Japanese candidate (b. 1977) |
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| ippei takeuchi researcher (ORCID 0000-0002-7923-164X) |
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| ippei fukada researcher |
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| ippei fujiwara economist (Keio University) |
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| ippei shimoshikiryo researcher (ORCID 0000-0001-7524-6986) |
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| ippei obayashi researcher |
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| ippei matsuzaki researcher |
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| ippei watanabe Japanese physicist |
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| ippei matsumoto researcher |
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| ippei takashima researcher (ORCID 0000-0002-0749-2349) |
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| ippei hiramatsu researcher |
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| ippei chiba researcher (ORCID 0000-0003-1966-3595) |
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| ippei yamaoka researcher |
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