emonloid4 is emon(Tes.)'s fourth album. It contains 9 tracks, sung by Hatsune Miku, Kagamine Rin, Kagamine Len, Megurine Luka, IA and SeeU. Also featured is the guest artist Easy Pop. It was first released at THE VOC@LOiD 超 M@STER 20.
A crossfade of the album can be heard on Nico Nico Douga.