Narita was trained under New Japan's "young lion" system. On July 4, 2017 at Lion's Gate Project 7, Narita made his professional wrestling debut against Shota Umino in a ten minute time limit draw. Later that month, Narita made his official debut teaming with Shota Umino in a losing effort against Suzuki-gun (El Desperado and Zack Sabre Jr.). From October 12 until December 21, Narita took part in the 2017 Young Lion Cup, finishing the tournament with a record of one draw and four losses, failing to win the tournament. Througout 2018 and mid-2019, as a customary process for young lions, Narita spent most of his matches losing to other, more experienced wrestlers, which would help put over other wrestlers while at the same time give him some in-ring, televised, experience. On May 10, it was was announced that Narita would replace Flip Gordon in the 2019 Best of the Super Juniors, after Gordon was forced to pull out of the tournament due to visa issues. Afterwards, Narita was placed in block B. He would finish the tournament in the bottom of his block, after losing all of his matches, being defeated by Bandido, BUSHI, DOUKI, El Phantasmo, Robbie Eagles, Rocky Romero, Ryusuke Taguchi and Will Ospreay. In August 2019, Narita was one of the young lions of the Japan dojo were involved in a heated rivalry with the young lions of the L.A. dojo that was build up during the 2019 G1 Climax and Super J-Cup tours. In September, Narita took part in the 2019 Young Lion Cup, finishing the tournament with a record of five wins and two losses. On September 22 at Destruction in Kobe, Narita entered the final day with a chance to win tournament, but a loss against Clark Connors prevented him from winning it. Afterwards, in post-match interview, Narita asked Katsuyori Shibata to join the L.A dojo, which Shibata accepted.