The deluxe album "Dos City (Deluxe)" includes Dos Mono's debut album "Dos City" released in March 2019, plus the latest song "Theater D (Encore)" used in the official video for "RIZIN LANDMARK 5", one of Japan's largest martial arts events, to be held on April 29, 2023 at Yoyogi National Gymnasium (1st gymnasium). In addition to elements of free jazz and progressive rock, which are their forte, the album emphasized the "twist" and "shift" of the beat by sampling retro video game music, etc. This album work was a big hit at the time. The 14 tracks include "in 20XX," which is still one of their best-known songs, "Schizo Indian," in which a thick beat rises from the sound of a saxophone, and "Clean Ya Nerves," which seems to twist the subtleties of free jazz into a beat, as well as skits that reinforce the album's world view.