[3] Masuda won the upper-grade section of the Elementary School Student Kurashiki Ōshō Tournament [ja] as an elementary school fourth-grade student in 2007,[2][4][5] and the following year finished tied for third place in the Elementary School Student Meijin Tournament [ja].
He was promoted to the rank of 3-dan in April 2012, and obtained full professional status and the rank of 4-dan in October 2014 while a second-year high school student[2] after finishing tied for first in the 55th 3-dan League with a record of 13 wins and 5 losses.
[7][3] In October 2016, Masuda won his first professional shogi tournament when he defeated Naohiro Ishida 2 games to none to win the 47th Shinjin-Ō [ja] title.
[10] Masuda also advanced to the championship match of the 50th Shinjin-Ō tournament in October 2019 against Satoshi Takano and his attempt to become just the second three-time winner of the tournament started promising by winning Game 1; Takano, however, came back to win the next two games and the match.
[11] On June 26, 2017, Masuda lost to Sōta Fujii in Ryūō ranking class game which was streamed live online and had received much pre-game press coverage both within Japan and internationally because a Fujii victory would allow him to set a new professional shogi record of 29 consecutive wins.