I did play with adding the 1-bit NTT Docomo emojis, as well as the 1998 Softbank emojis, into LisaGUI (my 1-bit Lisa-themed web OS). The glyphs are at most 12 pixels squared, and fit comfortably with the existing Lisa typefaces I've added so far (although they appear vertically stretched when viewed in a 2:3 pixel aspect ratio). They are still not included and won't be until I devote some time to sorting out the slightly nightmarish shitshow that is parsing unicode emoji character sequences.