Around the globe, Motomasa (Motomasa 
) is a very rare masculine forename. The first name Motomasa is habitual in Eastern Asia, particularly China, where it is an extremely rare male name. Much less frequently, Motomasa is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Motomasa | Japan, China, Brazil, United States |
| motomasa hikosaka (b. 1550) |
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| amano motomasa (b. 1559) |
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| ōsawa motomasa (b. 1619) |
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| motomasa tanaka researcher (ORCID 0000-0002-2994-7703) |
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| motomasa ihara researcher |
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| motomasa tanioka researcher |
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| motomasa furuse researcher (ORCID 0000-0001-9313-1410) |
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| ōe no motomasa |
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