is a Japanese former professional racing cyclist, who rode professionally between 2016 and 2024 for seven different teams. Her thirteen professional victories came entirely at the Japanese national road championships – seven Japanese National Road Race Championships titles and six Japanese National Time Trial Championships titles – while she also won three medals at the Asian Games.
Yonamine only switched from tennis to cycling when in college at the University of Tsukuba, and quickly achieved success in Japan, coming in second in both the Japanese National Road Race Championships and the Japanese National Time Trial Championships in 2012 at age 21. The next year, she won both the national road race and time trial championships. In the spring of 2016, she signed a short-term contract with the American UCI team , and later repeated her victory in the national time trial. Yonamine was selected to represent Japan in the 2016 Summer Olympics.
Major results Source:
2012 National Road Championships 2nd Road race 2nd Time trial 2013 National Road Championships 1st Road race 1st Time trial 2nd National Cyclo-cross Championships 8th Road race, Asian Road Championships 2014 1st Cross-country, National Mountain Bike Championships 2nd Time trial, Asian Road Championships National Road Championships 2nd Road race 2nd Time trial 2015 National Road Championships 1st Time trial 2nd Road race 2016 National Road Championships 1st Road race 1st Time trial 4th Road race, Asian Road Championships 5th Overall Tour Cycliste Féminin International de l'Ardèche 7th Overall Joe Martin Stage Race 7th Overall Trophée d'Or Féminin 7th Chrono des Nations 9th Overall Tour of the Gila 2017 National Road Championships 1st Road race 1st Time trial Combativity award Stage 2, Holland Ladies Tour 2018 National Road Championships 1st Road race 1st Time trial Asian Games 2nd Time trial 3rd Road race 2019 National Road Championships 1st Road race 1st Time trial 6th Overall Women's Tour of Scotland 2022 2nd Road race, National Road Championships 2nd Overall 2023 1st Road race, National Road Championships 2024 1st Road race, National Road Championships
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External links