Question: Paraestra, is a mixed martial arts fighting team and gym headquartered in Tokyo, Japan, with multiple gyms throughout Japan, the gym was founded by, which retired Japanese mixed martial artist, and Shooter?
Context: Cindy Dandois is a Belgian mixed martial artist who competes in the Bantamweight and Featherweight divisions in Invicta and the Ultimate Fighting Championship.  She began her judoka training at the age of 5 under the training of Johan Laats, and freestyle wrestling at age 8 under Joseph Mewis.  Dandois later transitioned into mixed martial arts, and trains at a gym in Belgium owned by her brother Ben Dandois.  She trains at Xtreme Couture Mixed Martial Arts while she is in the United States. Hiroyuki Abe (阿部裕幸 , Abe Hiroyuki , born February 9, 1970) , also known as Abe Ani, is a Japanese mixed martial artist currently fighting in the featherweight division for Shooto as well as teaching at his gym, Abe Ani Combat Club.  Abe is most notable for training female mixed martial arts veteran and Bellator Fighting Championships finalist, Megumi Fujii. Xtreme Couture Mixed Martial Arts is an American mixed martial arts training organization headed by former UFC Champion and former co-founder of Team Quest, Randy Couture.  Xtreme Couture was founded with the flagship gym in Las Vegas.  Since then, the franchise has spread to other cities in the United States and Canada.  Xtreme Couture Las Vegas is one of the largest gyms (over 24000 sqft ), most recognized brands and MMA gyms in the world where many past and current top MMA fighters train. Black House (Casa Preta) is a mixed martial arts fighting team and gym based out of Brazil.  Opened on November 27, 2006, Black House was started by former Brazilian Top Team member and black belt Carlos "Carlão" Barreto, Jorge Guimaraes and Rogerio Camoes.  Guimaraes acted as the team's manager and Camoes was in charge of the team's training. Bertrand Amoussou-Guenou (born May 29, 1966) is a retired French mixed martial artist and judoka.  He is a trainer for his younger brother Karl of "Team Amoussou" and, following official recognition of mixed martial arts in France, became the president of the national sanctioning body, the Commission National de Mixed Martial Arts, in January 2008.  On 1 October 2013, Amoussou assumed the position of president of the International Mixed Martial Arts Federation (IMMAF). Yasuhito Namekawa (滑川康仁 , Namekawa Yasuhito ) (born October 27, 1974) is a Japanese mixed martial artist who competes in the light heavyweight division.  Namekawa made his Mixed martial arts debut for Fighting Network Rings in 1998.  He fought in mainly Shoot fighting bouts until 1999 when Rings introduced the "King of King Rules".  Throughout his career, Namekawa has fought for organisations such as Rings, Deep and Pride FC.  His last fight to date was in 2008, with a professional Mixed martial arts career spanning ten years. Izuru Takeuchi is a retired Japanese mixed martial artist who competed in the middleweight division.  He is a veteran of both the Pancrase and Shooto organizations, and is the former Middleweight King of Pancrase.  Outside of mixed martial arts, Takeuchi has competed in numerous grappling tournaments, most notably in the All-Japan Combat Wrestling Championships held by the National Amateur Combat Wrestling Association. Sean Keith Sherk (born August 5, 1973) is a retired American mixed martial artist and former UFC Lightweight Champion.  Sherk competed in the Ultimate Fighting Championship and was one of the first combatants to have been a championship competitor in multiple weight divisions (having also competed for the UFC Welterweight Championship).  He was the second UFC Lightweight Champion in the organization's history after Jens Pulver vacated his title 5 years earlier.  Sherk also spent time competing in the Japan-based organizations, PRIDE Fighting Championships and Pancrase; going undefeated in both promotions.  He holds one of the longest undefeated streaks in mixed martial arts history, with only four career losses, all to fellow-UFC Champions.  Sherk announced his official retirement from mixed martial arts competition in September 2013 having last fought three years prior. Paraestra (Japanese: パラエストラ , from "palaestra") is a mixed martial arts fighting team and gym headquartered in Tokyo, Japan, with multiple gyms throughout Japan, as well as one in Newmarket, Canada.  The gym was founded by former Shooto welterweight champion, and Vale Tudo Japan competitor Yuki Nakai.  Today, Paraestra endorses both Shooto, and Jiu-Jitsu and contains many gyms throughout Japan. Yuki Nakai (中井祐樹 , Nakai Yūki ) is a retired Japanese mixed martial artist and Shooter.  He currently teaches shoot wrestling and jiu-jitsu, and is the president of the Japanese Confederation of Jiu-Jitsu.  He competed in Shooto, a proto-MMA promotion; as well as Vale Tudo Japan 1995, where he was outweighed by every opponent in the tournament.  Despite this, and despite suffering a severe eye injury in the first bout, Nakai managed to make it to the finals where he lost to Rickson Gracie.  Nakai is a legend of Shooto by many fighters and fans.  He is the founder of the Paraestra Shooto Gym and coaches fighters such as PRIDE and DREAM stand out Shinya Aoki, who also earned his A-Class Shoot wrestler's rank and his BJJ black belt from Nakai.
Answer: Yuki Nakai