Listen to 究極の睡眠 online. 究極の睡眠 is an Unknown language song and is sung by 眠れるスパ. 究極の睡眠, from the album 睡眠音楽：深い睡眠のための101曲・超熟睡サウンド, was released in the year 2025. The duration of the song is 5:22. Download Unknown songs online from JioSaavn.