Cognomen Tsunashima (Tsunashima 
) , around the globe, is a very rare last name. The surname Tsunashima is habitual in Brazil, where it is a very rare surname, Philippines, where it is an extremely rare surname, and the United Kingdom. Not in comparison with a country's population, it most frequently occurs in Brazil, China, and the United States. More frequently, Tsunashima is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Tsunashima | Japan, China, Philippines, United States, Brazil |
Tsumashima, and ツナシマ
| hiromichi tsunashima researcher |
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| ryo tsunashima researcher (ORCID 0000-0003-2663-0142) |
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| daisuke tsunashima researcher |
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| ryo tsunashima researcher ORCID 0000-0002-8852-6992 |
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| charles tsunashima (b. 1974) |
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