Family name Moriuchi (Moriuchi 
) , globally, is a rare last name. The last name Moriuchi is habitual in Portugal, where it is a very rare surname, Japan, and Colombia. Measured by absolute frequency, it is the most numerous in the United States, Indonesia, and Japan. Much less frequently, Moriuchi is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Moriuchi | China, Indonesia, United States, Colombia, Japan |
| aki moriuchi GB (b. 1947) |
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| toshiyuki moriuchi researcher |
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| hiroyuki moriuchi researcher (ORCID 0000-0001-7448-8115) |
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