17 in the junior combined world rankings in October 2008. Junior Grand Slam results:
Australian Open: 3R (2007, 2008)
French Open: Q1 (2007)
Wimbledon: 1R (2008)
United States Open: Q2 (2006)
2008 - 11
He also had participated in a number of Association of Tennis Professionals Challenger Tour events, winning some matches of those tournaments. He ended 2011 as ranked world northern
Moriya failed to qualify for French Open and Wimbledon, but he qualified for the 2012 United States Open to make his Grand Slam main draw debut, losing to Ivan Dodig in the first round.
In November, Moriya reached his first Association of Tennis Professionals Challenger Tour final in Toyota, where he lost to Michał Przysiężny in straight sets. He played the doubles rubber with Yasutaka Uchiyama and Japan advanced into the World Group Play-offs.
Moriya was the runner-up of Shanghai Challenger, losing to his countryman Yuichi Sugita in the final, and he made quarterfinals or better of Asian Challenger events in this year. 2014
In Australian hard court season, Moriya reached the final in the Burnie Challenger for the third time at this level and the semifinal in West Lakes.
Following this tournament, he entered the Association of Tennis Professionals rankings top 150.
In Asian swing, Moriya competed in the Association of Tennis Professionals events of Kuala Lumpur and Tokyo, both losing in the first round. 2015
In the 2015 Australian Open, despite losing of the qualifying round, Moriya was into main draw as lucky loser instead of Juan Martín del Potro. He was eliminated in the first round by Jerzy Janowicz with four sets.
In September, Moriya reached second round of the Shenzhen Open, beating Ričardas Berankis in straight sets.
He lost to third seed Tommy Robredo. Singles: 4 (1 title, 3 runner-up).