Throughout the world, Yuiko (Yuiko 
, ユイコ , Юико) is a rare feminine first name. The forename Yuiko is habitual in Hong Kong, where it is a rare feminine name, Japan, and Indonesia, where it is a very rare feminine name. More prevalently, Yuiko is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Yuiko | Japan, China, Indonesia, Hong Kong, United States |
| ユイコ | Japan |
| yuiko hosoya | 1973, JP (b. 1973) |
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| yuiko nagamine researcher (ORCID 0000-0003-1901-6697) |
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| yuiko tasaki-handa researcher |
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| yuiko hirata researcher |
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| yuiko matsuura researcher (ORCID 0000-0002-3397-1140) |
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| yuiko mizunuma researcher |
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| yuiko koyano researcher |
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| yuiko matsumoto researcher |
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| yuiko tanaka researcher (ORCID 0000-0002-7228-7798) |
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| yuiko sakuta researcher (ORCID 0000-0001-6956-6270) |
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| yuiko kimura researcher (ORCID 0000-0002-0207-0593) |
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Ito, Fukuda, Fujita, Ishida, Yasuda, Mishiro, Shimazu, Komiyama, Koizumi, Kikuchi, Tsuruno, Nishina, Oreilly, Yoshida, Matsuura, Sugawara, Kawamoto, Kawabata, Hardaway, Watanabe, Yamawaki, Kobayashi, Hebner, Tomita, Tanaka, Kimura, Ono, Maki, Sano, Sato, Seki, Arai, Baba, Kato, Kono, Kudo, Takahashi, Noda, Wong, Soyra, Asaba, Fujii, Inoue, Ogawa, Suzuki, Aikawa, Kojima, Kubozuka, Wada, and Yoshikawa