Around the world, Tanzawa (Tanzawa 
) is a very rare male forename. The forename Tanzawa is habitual in Eastern Asia, particularly China, where it is an extremely rare boy's name. Also, Tanzawa is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Tanzawa | Brazil, Japan, China, United States, Australia |
| ryu tanzawa Northern Mariana Islander footballer, US (b. 1998) |
|