Throughout the world, Tetsushi (Tetsushi 
) is a very rare boy's given name. The first name Tetsushi is habitual in Eastern Asia, particularly Japan, where it is a very rare male name. More prevalently, Tetsushi is the last name as well as the forename.
| VARIANT | COUNTRY |
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| Tetsushi | Japan, China, Vietnam, Singapore, United States |
| tetsushi nagano (b. 1900) |
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| tetsushi aizawa researcher |
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| tetsushi nakao researcher ORCID ID = 0000-0001-9979-2682 |
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| tetsushi sakuma researcher |
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| tetsushi murakami researcher (ORCID 0000-0001-8453-0006) |
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| tetsushi yoshikawa researcher |
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| tetsushi watanabe researcher |
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| tetsushi mori researcher |
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| tetsushi tsuruga researcher |
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| tetsushi nonaka researcher |
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| tetsushi tanibe researcher |
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| tetsushi komori researcher (ORCID 0000-0001-7349-2438) |
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| tetsushi hirano researcher (ORCID 0000-0003-1516-4684) |
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| tetsushi kataura researcher |
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| tetsushi suyama researcher |
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