Ideographic Research Group
The Ideographic Research Group (IRG), formerly called the Ideographic Rapporteur Group, is a subgroup of Working Group 2 (WG2) of ISO/IEC JTC1 Subcommittee 2 (SC2), which is the committee responsible for developing the Universal Coded Character Set (ISO/IEC 10646). IRG is tasked with preparing and reviewing sets of CJK unified ideographs for eventual inclusion in both ISO/IEC 10646 and The Unicode Standard.
Source: Wikipedia — Ideographic Research Group (CC BY-SA 4.0)