Cognomen Uchiya (Uchiya 
) , worldwide, is a rare surname. The family name Uchiya is habitual in Argentina, where it is a very rare surname, Brazil, and India, where it is an extremely rare surname. Measured by absolute frequency, it is commonest in India, Brazil, and Nigeria. Also, Uchiya is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Uchiya | Nigeria, United States, India, Argentina, Brazil |