#ロストワールド (#Lost World) are a visual kei band, formed in 2015. They will make their debut at Ikebukuro EDGE on October 23, 2015. They will then commence further activities at their presents live, 幻想前夜祭-ファンタヂック・イヴ-, at Shinjuku RUIDO K4 on December 5, at which they will release their first mini-album, 幻想世界地図.