Decome

Decome (デコメ, Dekome, short for decoration mail) is an email feature available on Japanese mobile phone services that allows users to use an online rich-text editor so that they can include decorative images (such as emoji), animations, and backgrounds in their email messages, which are encoded as HTML emails. The feature was first created by NTT Docomo as Deco Mail (デコメール, Deco Mēru), later being adopted by other Japanese mobile phone services under different brand names. Decome is a part of Japanese mobile phone culture and was widely used in the 2000s.