Last name Higai (Higai 
, Хигай 
) , in the world, is quite a rare cognomen. The family name Higai is characteristic of Japan, where it is quite a rare surname, Kazakhstan, where it is a rare surname, and Kyrgyzstan, where it is a very rare surname. Not in comparison with a country's population, it is commonest in Japan, Russia, and Kazakhstan. Much less frequently, Higai is the forename as well as the last name.
| koji higai researcher |
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