NTT Docomo (previously styled as DoCoMo) is a Japanese mobile phone carrier known for launching the i-mode mobile internet service in early 1999, which contained one of the earliest emoji sets.

i-mode's emoji set was designed by interface designer Shigetaka Kurita. While Kurita's 1999 emoji set is commonly cited as the first emoji set, it is more accurate to deem this one of the first emoji sets as opposed to the very first. This is because earlier examples have been located, albeit on less-popular platforms than Docomo's i-mode.

Notably in 1995, Docomo produced a popular Pocket Bell pager that allowed users to send each other simple pixel heart (❤) and telephone (☎) symbols. The popularity of this feature amongst Japan's youth has consistently been cited by Shigetaka Kurita as a direct source of inspiration when creating Docomo's 1999 emoji set.

The most recent update to Docomo's emoji set was released in 2013. From then until 2025, these emoji designs were featured on Japan-specific Android smartphones that were custom-built for Docomo by the likes of Samsung and Sony. For emoji characters not included in the Docomo set from 2013, the devices defaulted to using Google's Noto Color Emoji designs.

Note: Each emoji design within every pre-2010 emoji set has been mapped to its modern Unicode codepoint, despite these sets existing prior to Unicode emoji standardization.