Taguchi entered the 14th annual Best of the Super Juniors tournament in June 2007, having his strongest showing to date, winning five out of six group stage matches by defeating Tetsuya Naito, Koji Kanemoto, El Samurai, Dragon Gate's BxB Hulk, and junior champion Minoru, finishing in first place for his block with 10 points. Taguchi lost in the semifinals however, to eventual winner Milano Collection AT. As a reward of sorts for beating Minoru in the tournament, Taguchi was granted a second shot at the Junior Heavyweight title on July 6, 2007, defeating Minoru once more to win his first singles championship, and retrieving the Samurai Gym signboard. He made his first defense of the title on September 24, 2007, defeating Tiger Mask. He defended the championship once again on October 7, 2007 at independent promotion Pro Wrestling KAGEKI's tenth anniversary show, defeating the company's founder Azteca; the following day, Taguchi again defended the title, defeating Minoru once more. On October 28, 2007, Taguchi defended the title for the third time in one month, defeating 5-time champion Koji Kanemoto in Kobe, Kanemoto's hometown. Taguchi lost the title in his fifth defense on December 8, 2007, falling to Wataru Inoue.