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Family name コーイチ (Koichi , コーイチ ) , worldwide, is a common surname. The last name コーイチ is characteristic of Japan, where it is quite a rare surname, Taiwan, and Singapore. Measured by absolute frequency, it is the most numerous in Eastern Asia, particularly Japan, China, and Taiwan. Likewise, コーイチ is the forename as well as the last name.
VARIANT | COUNTRY |
---|---|
Koichi | Japan, Taiwan, China, Brazil, United States |
コーイチ | Japan |