Cognomen Udagawa (Udagawa 
, Удагава) , around the world, is a rare family name. The cognomen Udagawa is habitual in Paraguay, where it is quite a rare surname, Singapore, where it is a rare surname, and Japan. In absolute terms, it is the most numerous in Japan, Paraguay, and the United States. Very seldom, Udagawa is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Udagawa | Paraguay, Brazil, Japan, China, United States |
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hideko udagawa Japanese violinist |
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| shun-ichi udagawa botanist (b. 1931) |
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| masamichi udagawa Japanese artist (born 1964), JP (b. 1964) |
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| chihiro udagawa researcher |
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| jun udagawa researcher (ORCID 0000-0002-6573-9434) |
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| haruhide udagawa researcher (ORCID 0000-0002-1425-0997) |
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| hibiki udagawa researcher |
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| nobuyuki udagawa researcher |
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| taro udagawa researcher |
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| osamu udagawa researcher ORCID ID = 0000-0002-0088-3515 |
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| yukio udagawa researcher |
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| tomohiro udagawa researcher |
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| harushi udagawa researcher |
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