Cognomen 一谷 (一谷 
, Ichitani 
) , globally, is a rare family name. The surname 一谷 is habitual in Brazil, where it is a very rare surname, China, where it is an extremely rare surname, and the United States. More frequently, 一谷 is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| 一谷 | China |
| Ichitani | Japan, Brazil, United States |
| 一谷伸江 Japanese seiyū, JP (b. 1945) |
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| 一谷 啓悟 Japanese actor, JP (b. 1993) |
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