During the 2009–2010 season, Takahashi/Tran competed on the Junior Grand Prix circuit. They won the bronze medal at their first event and gold at their second event, which qualified them for the 2009–2010 Junior Grand Prix Final. They also debuted on the senior Grand Prix series with an 8th-place finish at NHK Trophy. They won silver at the JGP Final and at the Junior World Championships. They became the second pair representing Japan to medal at an ISU Championships (Yuko Kavaguti / Alexander Markuntsov were the first pair when they won silver in 2001).