[3] He was a runner-up in the submission wrestling world championships at ADCC losing in the finals to world-renowned Jean Jacques Machado.
After his second victory over Rumina Sato, Uno was recruited to fight for the UFC's Bantamweight (later renamed Lightweight) title against Jens Pulver.
Uno, who had earned a reputation as being "unflappable", began to show frustration for the first time in his career as Pulver neutralized all his offensive efforts.
In spite of finishing the bout pounding Fisher with punches from top crucifix position, Uno lost by a controversial unanimous decision.
After parting ways with the UFC, the fighter's trajectory in the Japanese MMA circuit was marked by a diverse range of outcomes.
2010, where he faced a unanimous decision loss against Kazuyuki Miyata, he rebounded with a victory over Akiyo Nishiura at Dream: Fight for Japan!
However, a notable setback occurred in September 2011 when he suffered a knockout defeat due to a head kick from Takeshi Inoue at DREAM 17.
Undeterred, he demonstrated resilience in subsequent matches, securing wins via submission over opponents such as Kyu Hwa Kim, Anthony Avila, and Daniel Romero in 2013.
The trend continued with victories against Jesse Brock,[5] Taiki Tsuchiya, and Raja Shippen in 2014..[6] Despite facing challenges and a decision loss to Yoshifumi Nakamura in January 2015, he rebounded with a submission win against Jung Ho Hwang in April 2016.
Notable moments include a submission win over Markus Held in November 2019 and a KO loss to Taison Naito in May 2021.
Uno's last appearance for AJPW would be in July, allying with Kashin and Robbie Brookside to beat Hayashi, Jimmy Yang and Ebessan.