Juniors

As a junior, Moriya compiled a singles win–loss record of 76–37, reaching as high as No. 17 in the junior combined world rankings in October 2008.^[2]

Junior Grand Slam results:

Australian Open: 3R (2007, 2008)
French Open: Q1 (2007)
Wimbledon: 1R (2008)
US Open: Q2 (2006)

2008-11

Moriya had won three ITF Futures events in Japan and Chinese Taipei. He also had participated in a number of ATP Challenger Tour events, winning some matches of those tournaments. He ended 2011 as ranked world no. 327.

2012: Major debut, First ATP win

Moriya failed to qualify for French Open and Wimbledon, but he qualified for the 2012 US Open to make his Grand Slam main draw debut, losing to Ivan Dodig in the first round.^[3]

During the Asian hardcourt swing, he defeated Robin Haase in the Thailand Open to record his first ATP main draw win, and played a close match against Stanislas Wawrinka at the Japan Open, losing 5–7, 6–4, 4–6.^[4] In November, Moriya reached his first ATP Challenger Tour final in Toyota, where he lost to Michał Przysiężny in straight sets.^[5]

2013: Davis Cup debut

He represented Japan for the first time in his career at the 2013 Davis Cup Asia/Oceania Zone Group I against South Korea. 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: First Challenger title and Top 150

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.

Moriya won his first challenger title, winning the $50,000+H Granby Challenger event in Canada by beating Fabrice Martin in the final.^[6] Following this tournament, he entered the ATP rankings top 150. In the Asian swing, Moriya competed in the ATP events of Kuala Lumpur and Tokyo, both losing in the first round.

2015: Second ATP win

In the 2015 Australian Open, despite losing of the qualifying round, Moriya entered into main draw as lucky loser replacing Juan Martín del Potro.^[7] He was eliminated in the first round by Jerzy Janowicz with four sets.

He won through the qualifying at the 2015 Wimbledon Championships, dropping just one set, but lost to ninth seed and reigning US Open champion Marin Čilić in the opening round.^[8] In September, Moriya reached the second round of the Shenzhen Open, beating Ričardas Berankis in straight sets. He lost to third seed Tommy Robredo.

2022: First ATP 500 level win

During the Asian hardcourt swing, Moriya entered the 2022 Korea Open and the 2022 Rakuten Japan Open Tennis Championships after qualifying for the singles main draw as a lucky loser. In the latter he defeated compatriot fellow qualifier Yuta Shimizu for his first ATP 500 and Tokyo Open win and third ATP win overall. As a result he moved 40 positions up the rankings into the top 250.

Singles: 27 (11–16)

Result	W–L	Date	Tournament	Tier	Surface	Opponent	Score
Loss	0–1	Oct 2008	Japan F11, Tokyo	Futures	Hard	Yūichi Sugita	2–6, 5–7
Win	1–1	Jun 2009	Japan F5, Kusatsu	Futures	Carpet	Hiroki Kondo	6–2, 6–2
Loss	1–2	Jun 2009	Japan F6, Akishima	Futures	Carpet	Yi Chu-huan	7–5, 2–6, 2–6
Loss	1–3	Mar 2010	Japan F1, Tokyo	Futures	Hard	Yuichi Ito	5–7, 6–1, 4–6
Loss	1–4	Jun 2010	Japan F5, Karuizawa	Futures	Clay	Mark Verryth	1–6, 4–6
Win	2–4	Jul 2010	Japan F8, Sapporo	Futures	Clay	Lee Hsin-han	6–1, 6–3
Loss	2–5	Sep 2010	Australia F6, Darwin	Futures	Hard	John Millman	0–6, 1–6
Loss	2–6	Jun 2011	Japan F6, Kashiwa	Futures	Hard	Junn Mitsuhashi	4–6, 0–6
Loss	2–7	Jul 2011	Japan F8, Sapporo	Futures	Clay	Junn Mitsuhashi	6–7(7–9), 7–5, 4–6
Win	3–7	Jul 2011	Chinese Taipei F2, Taipei	Futures	Hard	An Jae-sung	6–3, 4–6, 6–3
Loss	3–8	Oct 2011	Australia F10, Port Pirie	Futures	Hard	Yasutaka Uchiyama	6–7(6–8), 4–6
Win	4–8	Feb 2012	Australia F2, Mildura	Futures	Grass	Brydan Klein	6–4, 4–6, 6–2
Win	5–8	Apr 2012	Japan F3, Kōfu	Futures	Hard	Yasutaka Uchiyama	6–1, 6–4
Loss	5–9	Apr 2012	Chinese Taipei F2, Kaohsiung	Futures	Hard	James Ward	5–7, 6–7(3–7)
Loss	5–10	Nov 2012	Toyota, Japan	Challenger	Carpet (i)	Michał Przysiężny	2–6, 3–6
Loss	5–11	Sep 2013	Shanghai, China, P.R.	Challenger	Hard	Yūichi Sugita	3–6, 3–6
Loss	5–12	Feb 2014	Burnie, Australia	Challenger	Hard	Matt Reid	3–6, 2–6
Win	6–12	Jul 2014	Granby, Canada	Challenger	Hard	Fabrice Martin	7–5, 6–7(4–7), 6–3
Win	7–12	Sep 2016	Nanchang, China, P.R.	Challenger	Hard	Chung Hyeon	4–6, 6–1, 6–4
Loss	7–13	Oct 2016	Ningbo, China, P.R.	Challenger	Hard	Lu Yen-hsun	3–6, 1–6
Win	8–13	Apr 2018	Uzbekistan F2, Bukhara	Futures	Hard	Evgenii Tiurnev	6–0, 6–1
Win	9–13	May 2018	Loughborough, Great Britain	Challenger	Hard (i)	James Ward	6–2, 7–5
Loss	9–14	Sep 2018	Shanghai, China, P.R.	Challenger	Hard	Blaž Kavčič	1–6, 6–7(1–7)
Loss	9–15	Nov 2021	Roanne, France	Challenger	Hard	Hugo Grenier	2–6, 3–6
Win	10-15	Apr 2022	M25, Nottingham, UK	World Tennis Tour	Hard (i)	Antoine Escoffier	3-6, 6-0, 6-2
Loss	10-16	Jun 2023	M25, Jakarta, Indonesia	World Tennis Tour	Hard	Yanki Erel	3-6, 6-4, 2-6
Win	11-16	Jun 2023	M25, Nakhon Si Thammarat, Thailand	World Tennis Tour	Hard	Kasidit Samrej	2-6, 6-2, 6-2

Doubles: 10 (5–5)

Result	W–L	Date	Tournament	Tier	Surface	Partner	Opponents	Score
Loss	0–1	Aug 2009	Thailand F2, Nonthaburi	Futures	Hard	Tasuku Iwami	Nesa Arta Christopher Rungkat	6–4, 4–6, [10–12]
Win	1–1	Apr 2010	Japan F4, Tsukuba	Futures	Hard	Tasuku Iwami	Bumpei Sato Maciek Sykut	6–4, 6–2
Loss	1–2	May 2011	Italy F10, Aosta	Futures	Clay	Shuichi Sekiguchi	Radu Albot Yasutaka Uchiyama	6–4, 5–7, [7–10]
Win	2–2	Feb 2012	Germany F4, Nußloch	Futures	Carpet (i)	Yasutaka Uchiyama	Marko Lenz George von Massow	7–6(7–4), 6–3
Loss	2–3	Apr 2013	China F2, Chengdu	Futures	Hard	Yasutaka Uchiyama	Gong Maoxin Zeng Shaoxuan	7–6(7–4), 3–6, [8–10]
Win	3–3	Apr 2013	China F3, Yuxi	Futures	Hard	Yasutaka Uchiyama	Brydan Klein Jose Statham	2–6, 6–4, [10–6]
Loss	3–4	Feb 2019	Launceston, Australia	Challenger	Hard	Mohamed Safwat	Max Purcell Luke Saville	5–7, 4–6
Loss	3–5	Feb 2019	Bangkok, Thailand	Challenger	Hard	Enrique López Pérez	Li Zhe Gonçalo Oliveira	2–6, 1–6
Win	4–5	Jun 2023	M25 Jakarta, Indonesia	World Tennis Tour	Hard	Francis Casey Alcantara	Nathan Anthony Barki Christopher Rungkat	6–2, 6–1
Win	5–5	Jun 2023	M25 Nakhon Si Thammarat, Thailand	World Tennis Tour	Hard	Francis Casey Alcantara	Maximus Jones Finn Reynolds	6–2, 6–4