Joo Shikkaku is the first album released by Mugen Regina.
- Shoujo wa Kitarite (少女は来たりて)
- Kurai Taiyo (暗い太陽)
- Deja vu no Zankyou (デジャヴの残響)
- Sakura Kurui, Saku wa Mayoishi (桜狂い、咲くは迷いし)
- Uruwashiki Kyoubou na Sekai (麗しき凶暴な世界)
- Jigoku Yori (地獄より)
- The official english title of the album is At the Threshold of a dream and has been referred to as that on the group's official Facebook page,