People Japan Sumiko Yokoyama peoplepill id: sumiko-yokoyamaSY 18 views today 18 views this weekJapanese cross-country skierSumiko YokoyamaBiographyListsAlso ViewedListsSumiko Yokoyama is in following listsBy field of workNotable Japanese athletesGender:Female, Born in:Years 1970 to 1999By work and/or countryNotable Japanese AthletesGender:Female, Born in:Years 1970 to 1999From our partnersSponsoredSumiko Yokoyama