Question: Masakatsu Ueda is a MMA fighter who is a blue belt under the martial artist who teaches which two disciplines?

full_context: Document 1: Bibiano Fernandes: Bibiano Fernandes da Silva Neto (born March 30, 1980) is a Brazilian professional mixed martial artist who has competed for K-1, DREAM, ONE Championship and King of the Cage. He was the first DREAM Featherweight Champion and DREAM Bantamweight Champion, and currently the ONE Bantamweight Champion. He is currently ranked as the #5 Bantamweight in the world by MMA Weekly and Fight Matrix as well as the #1 bantamweight outside of the UFC He is the main sparring partner of UFC Flyweight champion Demetrious Johnson.
Document 2: Masakatsu Ueda: Masakatsu Ueda (born December 21, 1977) is a professional Japanese mixed martial artist who currently competes in the bantamweight division (known as featherweight in Shooto) for Shooto where he is the former Featherweight champion. Ueda won the vacant title after defeating Koetsu Okazai on March 28, 2008, by Unanimous Decision at Shooto's Back To Our Roots 8 show. Ueda was also a college level wrestler in Japan where holds a win over fellow mixed martial artist and Japanese Superstar Norifumi Yamamoto, better known as "Kid" Yamamoto. Ueda has also won many national titles in Combat Wrestling. He also won the All Japan Shooto Grappling championship, and both A and B class Shooto Rookie Tournaments. He is a blue belt in Brazilian Jiu-Jitsu under Yuki Nakai.
Document 3: Neil Melanson: Neil Melanson is an American combat sports coach, currently he is the Head Grappling coach at Jaco Hybrid Training Center. He is the former Head Grappling coach at both Xtreme Couture Las Vegas and Alliance MMA. Melanson specializes in Catch wrestling, while drawing elements from Judo. He is especially known for his guard work, leg locks and triangle chokes. He has trained under Gene LeBell, Gokor Chivichyan, and Karo Parisyan (who awarded him his black belt).
Document 4: Satoru Kitaoka: Satoru Kitaoka (北岡悟 , Kitaoka Satoru , born 4 February 1980) , is a Japanese shoot wrestler and mixed martial artist who most recently competed in the Lightweight division of RIZIN. A professional competitor since 2000, he has also competed for DREAM, Pancrase, DEEP, and World Victory Road. Kitaoka is renowned for his Catch wrestling abilities which he learned studying under two of Japan's most respected shoot wrestlers Masakatsu Funaki and Minoru Suzuki. In addition to mixed martial arts success, Kitaoka has also won several submission grappling tournaments, including being the reigning Brazilian jiu-jitsu and No-Gi Open Champion in both the 79.7 kg and Absolute divisions. In August 2008, he entered and won the 2008 Sengoku Lightweight Grand Prix. He is currently the DEEP Lightweight Champion.
Document 5: Hiroki Nakajima: Hiroki Nakajima (born July 5, 1988) in Tokyo, Japan is a Japanese welterweight kickboxer fighting out of Tokyo, Japan for the Bungeling Bay gym. He is the 2009 Krush middleweight tournament champion and 2010 K-1 World MAX Japan runner up, currently fighting in K-1 MAX. He is touted as one of the future Japanese kickboxing stars and is the man picked by the legendary MAX fighter Masato to be his successor.
Document 6: Kazushi Sakuraba: Kazushi Sakuraba (桜庭 和志 , Sakuraba Kazushi , born July 14, 1969) is a Japanese mixed martial artist and professional wrestler, currently signed to Rizin Fighting Federation. He has competed in traditional puroresu for New Japan Pro Wrestling and shoot-style competition for UWFi and Kingdom Pro Wrestling. He has fought in MMA competition in the Ultimate Fighting Championship, Pride Fighting Championships, Hero's and Dream. He is known as the "Gracie Hunter" or the "Gracie Killer" due to his wins over four members of the famed Gracie family: Royler Gracie, Renzo Gracie, Ryan Gracie, and Royce Gracie. In particular, Sakuraba is famous for his initial fight with Royce, which lasted ninety minutes.
Document 7: Akiyo Nishiura: "Wicky" Akiyo Nishiura (born August 8, 1983) is a Japanese professional mixed martial artist and kickboxer. Nishiura currently competes in MMA for the DREAM organization as a Featherweight and has also fought for Shooto, Cage Force, and DEEP.
Document 8: Shooto: Shooto is a combat sport/mixed martial arts system and mixed martial arts organization that is governed by the "Shooto Association" and the "International Shooto Commission". Shooto was originally formed in 1985, as an organization and as a particular fighting system derived from shoot wrestling. Practitioners are referred to as shooters, similarly to practitioners of shoot wrestling. Shooto rules have evolved such that their events are now true mixed martial arts competitions.
Document 9: B.J. Penn: Jay Dee "B.J." Penn (born December 13, 1978) is an American professional mixed martial artist and Brazilian Jiu-Jitsu practitioner. Penn debuted and competed in the Ultimate Fighting Championship (UFC), and later in K-1. Prior to fighting for the UFC, he became the first American Gold medalist of the World Jiu-Jitsu Championship. In mixed martial arts, Penn has competed in the Featherweight, Lightweight, Welterweight, and Middleweight divisions. As a former UFC Lightweight Champion and UFC Welterweight Champion, he is one of only three fighters in UFC history to win titles in multiple weight classes. Penn was also a Co-champion in the UFC 41 Lightweight Tournament, due to an eventual draw opposite Caol Uno in the tournament finale. Through his tenures as champion, Penn unofficially unified the UFC Lightweight Championship (against Sean Sherk) and broke the all-time lightweight title defense record. Penn was inducted into the UFC Hall of Fame, as the inaugural inductee in the Modern-Era Wing by career-long rival Matt Hughes, during "International Fight Week" in July 2015.
Document 10: Yuki Nakai: 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.
Document 11: Shinya Aoki: Shinya Aoki (青木 真也 , Aoki Shin'ya , born May 9, 1983) is a Japanese mixed martial artist and grappler currently competing in ONE Championship's and Rizin Fighting Federation's Lightweight division. A professional competitor since 2003, he is noted for being the DREAM Lightweight Champion, ONE Lightweight Champion, former WAMMA Lightweight Champion and former Shooto Welterweight Champion. Aoki is an A-class Shoot wrestler and BJJ black belt, both under his long-term mentor Yuki Nakai, as well as a black belt judoka. As of 2008, Aoki, along with DEEP champion Masakazu Imanari, and Sengoku champion Satoru Kitaoka have founded the "Nippon Top Team" as a group of elite Japanese grapplers competing in MMA. As well as his MMA credentials, Aoki has garnered several submission grappling accolades including two All Japan Jiu-Jitsu Championships, a Japan Open Jiu-Jitsu Championship, a Budo Open Championship, and an ADCC Japan Championship.
Document 12: Masato (kickboxer): Masato Kobayashi (Japanese: 魔裟斗 ["Kobayashi Masato"]; born March 10, 1979) is a Japanese former welterweight kickboxer. He was the world champion of ISKA at Welterweight under Oriental rules, and he was the winner of K-1 WORLD MAX World tournament in 2003 and 2008. In addition, he was also the runner-up of K-1 World MAX World tournament in 2004 and 2007. Prior to the K-1 Rising event in Madrid in May 2012, it was announced that Masato will be working as an executive producer for K-1.
Document 13: Ran Nakash: Ran Nakash (born 1978, Haifa) is an Israeli cruiserweight boxer. He is currently Chief Commander and Head Instructor of the Israel Defense Forces Krav Maga Instructional Division and holds a professional boxing record of 26 wins with 18 by knockout and one loss. He scored his latest victory on January 21, 2012 defeating Derek Bryant by unanimous decision. His only loss to date occurred on April 2, 2011 against WBO Cruiserweight champion Marco Huck. Despite accepting the fight on short notice as a late replacement for Giacobbe Fragomeni, Nakash fought a competitive fight, pressing his opponent throughout the 12-round bout, though Huck was ultimately awarded the victory on points.
Document 14: Noriaki Inoue: Noriaki Inoue (1902-12-03, Tanabe – 1994-04-13, Kunitachi) was a Japanese martial artist, who was in his early years closely associated with the spiritual and technical development of aikido along with his uncle Morihei Ueshiba. Inoue is the founder of Shinwa Taidō, a martial art which he later renamed to Shin'ei Taidō.
Document 15: Yukio Sakaguchi: Yukio Sakaguchi (坂口 征夫 , Sakaguchi Yukio , born July 26, 1973) is a Japanese professional mixed martial artist, professional wrestler, actor and judoka, who is currently signed with DDT Pro-Wrestling and has fought and competed for World Victory Road, DREAM, Pancrase, Pro Wrestling Wave, S-Cup, Shooto, Big Japan Pro Wrestling, Union Pro Wrestling, Kaientai Dojo, Dradition, Legend The Pro-Wrestling and K-1. Sakaguchi is known for his fight with Nigerian K-1 kickboxer, Film actor, and male model Andy Ologun. Yukio is the son of former judoka and professional wrestling legend Seiji Sakaguchi and the older brother of actor Kenji Sakaguchi, who notably co-starred in Ikebukuro West Gate Park when the television show made its debut run in 2000 and most recently in 2012 started making regular appearances on the show Saigo Kara Nibanme no Koi, he also co-starred in the film Face.
ground_truth: shoot wrestling and jiu-jitsu