He released his fifth studio album in August 2013, and went on a live tour titled "Masaaki Endoh Live Tour 2013 ~Extreme V Machine~" in September 2013 to promote the album. He explained that the "V" stands for "voice" on his Extreme V Machine live tour, as well as signifying the number 5 in Roman numerals. In spring 2014, he formed a small group called "Endoh-kai" to sing the opening theme of and Lantis launched a small campaign to promote the group.