夢遊病者, pronounced "Muyūbyō-sha" and translated as "Sleepwalker" from Japanese, is a band that defies conventional categorization, blending elements of black metal, punk, jazz, and folk music from various cultures to create a unique and often disorienting sonic experience. The trio is truly international, with members hailing from Japan, Russia, and the United States. Their anonymity adds to the esoteric allure of their music, with the band often shrouding their individual identities and instead focusing on the intricate tapestry of sounds they weave together.

Since their formation, 夢遊病者 has garnered attention for their compelling and unpredictable releases, which are characterized by a relentless quest for musical exploration. Notable works include "5772," an album that weaves narratives from the biblical to the personal against a backdrop of intense and atmospheric arrangements, and "一期一会," translated as "For One Encounter," which was inspired by a Japanese idiom celebrating the unique nature of one-time meetings. Their more recent offerings, such as "Noč Na Krayu Sveta," translate to "Night on the Edge of the World," which sees the band continuing to expand their sonic horizons, drawing listeners into their distinctive world where geographical borders and traditional genre confines cease to exist. Each release is a testament to the band's intricate artistry and their commitment to pushing the boundaries of music.