They debuted with a DVD release last week but I don't know how "official" it is...maybe Johnny is testing the waters?
On another random note, Tegomasu's "Yume Tabibito" is the most song played on my iTunes
Also the best part in Hey! Say! JUMP's "Nemuri no Mori" is Yuto's "Mou modorenai, yo ni mo fushigi no monogatari" -> Please more solos for him