[1] Morii was then booked to face Yuichiro Katsumata at M-1 FAIRTEX SINGHA BEERFreshmans in Oomori on April 6, 2008.
[4] After notching the first stoppage victory of his career, Morii faced Hayato Uesugi at AJKF Fighting Base 2 on October 3, 2008.
[5] Morii made his sixth appearance of the year against Takahiro Horiguchi at AJKF Fujiwara Matsuri 2008 on December 5, 2008.
[6] Morii participated in the Krush K-1 rules Rookies Cup, the quarter and semifinals of which were held on February 1, 2009.
Morii faced Rikiya Oomae in the first bout of the tournament, and beat him by a unanimous decision, with all three judges scoring the fight 30–28 in his favor.
[9] Morii made his second consecutive Krush appearance against Hiroshi Iwakiri at Krush-EX ～Innocent Fighter～ on October 12, 2009.
[13] Morii was booked to face Kompayak Weerasakreck at M-1 RAJA BOXING SINGHA BEER Muay Thai Challenge NAI KANOMTOM vol.2 on June 6, 2010.
[14] Morii faced Ryo Pegasus, in his third fight of the year, at M-1 FAIRTEX Singha Beer Muay Thai Challenge NAI KANOMTOM vol.3 on September 12, 2010.
[15] Morii was booked to face Reio for the interim WPMF Japan featherweight title at Fujiwara Matsuri 2010 on December 1, 2010.
He won the fight by a first-round technical knockout, after knocking Reio down three times by the 2:55 minute mark of the opening rounds.
[16] Morii was booked to unify the WPMF titles with the regular champion Hiroki Nagashima at M-1 FAIRTEX RAORAK MUAY vol.1 on April 10, 2011.
[19] Morii next faced the former WBO super bantamweight champion Ratanachai Sor.Vorapin at M-1 FAIRTEX RAORAK MUAY vol.3 on September 11, 2011.
[24] Morii challenged the reigning WBC Muaythai Japan featherweight champion Heihachi Nakajima at NJKF KICK TO THE FUTURE 2 on April 29, 2012.
[27] Morii made his first WPMF Japan featherweight title defense against Hiroki Nagashima at REBELS 12 on July 29, 2012.
[28] Morii was booked to make his first WBC Muaythai featherweight title defense against Hiroki Akimoto at MA Japan Kick BREAK-30 ～UNIFICATION～ on October 7, 2012.
[32] After successfully capturing his first kickboxing title, Morii was booked to face Rungpet Kaiyanghadao in a non-title bout at Fujiwara Matsuri on June 19, 2014.
[36] Morii extended his winning streak to six fights after beating Densiam lookprabat by unanimous decision at NO KICK NO LIFE 2015 on February 11, 2015.
[40] Morii made his second promotional appearance at ZONE 3 on September 13, 2015, against Super Crazy K.[41] He snapped his two-fight losing streak with a first-round technical knockout of K, whom he stopped with repeated low kicks.
[42] Morii faced Armin Sasiprapa at Muay Thai Open 33 on December 13, 2015, in his final fight of the year.
He knocked Ranger down three times by the 1:55 minute mark of the opening round, which earned him an automatic technical knockout victory.
He was first booked to face Juan Mario Kaewsamrit at KNOCK OUT vol.3 on June 17, 2017, whom he beat by a third-round technical knockout.
The fight was stopped on the advice of the ringside doctor, due to a cut above Machida's left eye.
The fight was stopped on the advice of the ringside physician at the 1:15 minute mark of the second round, due to a broken nose.
[64] Morii faced the RISE Super Featherweight champion Chan Hyung Lee at KNOCK OUT 2019 WINTER on February 11, 2019.
[72] Morii faced Taison Maeguchi at NO KICK NO LIFE Shin Shou Yuigadokuson on July 22, 2021, in his second and final fight of the year.
[73] Morii faced the two-time WBC Muaythai Japan welterweight champion Kenta Yamada at the January 9, 2022 NO KICK NO LIFE event.