Cognomen Tokuko (Tokuko 
) , across the world, is a rare surname. The cognomen Tokuko is habitual in Eastern Asia, particularly Japan, where it is a rare surname. Very seldom, Tokuko is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Tokuko | Japan, United States, Canada, France, Brazil |
| tokuko umeya (b. 1875) |
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| tokuko haraguchi researcher |
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| tokuko ujino-ihara researcher |
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