Endoh was drafted as the ninth overall pick in the 2016 MLS SuperDraft by Toronto FC and signed with the club on 27 February 2016.[2] He made his professional debut on 6 March 2016 against the New York Red Bulls.[3] He scored his first MLS goal on 7 May 2016, in Toronto FC's home opener against FC Dallas, at the newly renovated BMO Field, which ended in a 1–0 victory.[4][5] At the end of 2017, he was released by the club, who declined to exercise their contract option on him.[6]
In 2018, he went on a month-long trial with Belgian second division club KFCO Beerschot Wilrijk, but was not offered a contract and returned to Canada.[7][8][9] On 2 August 2018, after not being offered a first-team deal, Endoh signed a USL contract with the second-team Toronto FC II.[10] He made an immediate impact, scoring two goals and adding an assist in his fifth game back against Louisville City.[11] He followed that up in his eighth game when he scored a hat trick against FC Cincinnati, his first career hat trick as a professional.[12]
On 16 January 2019, Endoh rejoined Toronto's first team in Major League Soccer, signing an MLS contract.[13] He made his first appearance of the season for Toronto on 26 June 2019,[14] scoring the fastest goal in club history, only 29 seconds into the game against Atlanta United; Toronto went on to win the game 3–2.[14][15]
Endoh has represented Japan at the U15 through U17 levels.[8]
Personal life
From 2005 to 2011, Endoh was part of the Japan Football Association Academy in Fukushima. Forced to leave after the Fukushima earthquake, he moved to the United States in 2011, going to the University of Maryland. Since leaving Japan he has learned to speak English, a language he could not speak well in 2011.[19]