Atsushi Oka

amateuryears1 = 2013 amateurteam1 = C Project amateuryears2 = 2013 amateurteam2 = Cannondale–Champion System amateuryears3 = 2014–2015 amateurteam3 = EQA proyears1 = 2017–2019 proteam1 = proyears2 = 2020–2021 proteam2 = proyears3 = 2021–2022 proteam3 = proyears4 = 2023–2024 proteam4 = proyears5 = 2025– proteam5 = majorwins = medaltemplates = show-medals =

is a Japanese professional cyclist, who currently rides for UCI Continental team .

Career After three years at Japanese UCI Continental team , Oka signed with French UCI ProTeam in 2020, joining compatriots Fumiyuki Beppu, Masahiro Ishigami, and Hideto Nakane.

At the end of the 2020 season, it was reported that Oka was one of several riders who filed complaints to the UCI about team manager Philippe Lannes trying to force them out of the team midway through their contracts and evict them out of the team house, amidst controversies over "missing payments, contracts not being honored, and threatening behavior" towards the riders' futures on the team. Speculation arose that Lannes' actions, especially towards Oka and Ishigami, partially stemmed from his frustrations over Japanese sponsor Nippo leaving the team, further contributing to the team's financial troubles; however, both riders remained registered with team for the 2021 season.

On 28 April 2021, Oka received a four-month suspension from the UCI after an anti-doping control test came back positive for acetazolamide, a drug banned by WADA that is often used to treat altitude sickness. Given the retroactive suspension from the date of the positive on 13 December 2020, Oka was eligible to race again on 24 May 2021.

On 29 June, Oka signed with , joining teammate Masahiro Ishigami, who had signed a month earlier.

Personal life Oka's older brother Yasumasa is also a professional cyclist.

Major results

2013

2nd Road race, National Junior Road Championships 2014 5th Time trial, National Road Championships 2015 7th Time trial, National Road Championships 2016 2nd Time trial, National Under–23 Road Championships 2017 4th Time trial, National Road Championships 6th Overall Tour de Tochigi 2018 4th Oita Urban Classic 9th Overall Tour de Tochigi 10th Tour de Okinawa 2019 1st Prologue Tour of Japan 2nd Time trial, National Road Championships 2nd Overall Tour de Kumano 4th Overall Tour de Tochigi 2021 National Road Championships 4th Time trial 5th Road race 2022 1st Stage 3 Tour of Japan 4th Umag Trophy 2023 1st Overall Tour de Kumano National Road Championships 2nd Road race 4th Time trial 3rd Overall Tour of Japan 1st Stage 5 2024 1st Overall Tour de Kumano 1st Points classification 1st Active Rider classification, AlUla Tour 1st Stage 2 Tour of Japan 2025 1st Tour de Okinawa 1st Points classification Tour of Japan 1st Stage 2 3rd Overall Tour de Kumano 10th Oita Urban Classic 2026 6th Overall Tour de Kumano