outs. Although he wanted to defend his NJKF title after this tournament, he returned his title as on 1 April because he was going to participate the world tournament and it was hard to arrange his schedule for defending title. On December 31, 2010, Nagashima took part in a "mixed rules" bout against Judo and Brazilian Jiu-Jitsu expert Shinya Aoki at Dynamite!! 2010, the annual New Year's Eve fight festival. One round was to be held under Kickboxing rules and the other under Mixed Martial Arts rules. A Coin Toss decided that the Kickboxing round was to commense first. Aoki took advantage of the fact that he only had to survive through a single three-minute round of Kickboxing and thus threw pointless attacks like flying dropkicks and rolling heel kicks while holding onto the ring ropes in order to run the clock down. As the second round began, and Aoki now in his element under MMA rules, he dropped immediately for a Double Leg Takedown, while Nagashima launched a Flying Knee square into Aoki's jaw. The blow instantly knocked out Aoki, after which Nagashima followed up with a number of hammerfists on the supine Aoki. The referee stepped in and stopped the fight four seconds into the period. He faced Henri van Opstal at REBELS 13 in Tokyo on October 28, 2012 with a place at the Shoot Boxing World Tournament 2012 on the line. He lost via unanimous decision (30-29, 30-29, 29-28). He lost a one-sided unanimous decision to Robin van Roosmalen at Glory 4: Tokyo - 2012 Heavyweight Grand Slam in Saitama, Japan on December 31, 2012 after being dropped in round one. He lost to Yoshihiro Sato by unanimous decision at Hoost Cup: Kings in Nagoya, Japan on June 16, 2013. Nagashima stopped a three-fight skid when he beat Hiroki Shishido by unanimous decision at Shoot Boxing Battle Summit Ground Zero Tokyo 2013 in Tokyo, Japan on November 15, 2013. Professional wrestling On March 6, 2011, Nagashima appeared in the puroresu promotion Pro Wrestling Zero1 to challenge fellow rookie Daichi Hashimoto, who was scheduled to face Masahiro Chono, and said that he had also made his debut in wrestling and soon would be Daichi's rival. Nagashima began training in the Zero1 dojo under Shinjiro Otani, who was also Hashimoto's trainer. Although Daichi was the original target to Yuichiro, veteran wrestler Kohei Sato offered to wrestle Nagashima first,