En route to the final, he beat three seeded players, including Nguyễn Tiến Minh, Chen Jin and Bao Chunlai.

[2] In 2012, he competed at the London 2012 Summer Olympics in the men's singles event, but did not advance to the knock-out stage after being defeated by Niluka Karunaratne of Sri Lanka with a score of 18–21, 16–21.

A season of the Super Series featured a total of twelve tournaments around the world since the 2011 season,[5] with successful players invited to the Super Series Finals held at the year end.

[6] In October 2015, Tago was removed from Japan's national team by head coach Park Joo-bong due to indiscipline, after he repeatedly missed training sessions and was proving to be a bad influence to other players.

[7] On 8 April 2016, Tago admitted to squandering 10 million Japanese yen over a period of 2 years after making over 60 visits to illegal casinos alongside other professional players, including countryman Kento Momota, who was banned from competition until late 2017 and forced to miss the Olympic Games as a result.