[4] In November, Moriya reached his first ATP Challenger Tour final in Toyota, where he lost to Michał Przysiężny in straight sets.

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.

In the Asian swing, Moriya competed in the ATP events of Kuala Lumpur and Tokyo, both losing in the first round.

In the 2015 Australian Open, despite losing of the qualifying round, Moriya entered into main draw as lucky loser replacing Juan Martín del Potro.

[8] In September, Moriya reached the second round of the Shenzhen Open, beating Ričardas Berankis in straight sets.