Ideographic Variation Sequences
As of 23 October 2025 [update] , VS17 (U+E0100) to VS48 (U+E011F) are used in ideographic variation sequences in the Unicode Ideographic Variation Database (IVD). [3] [4] These selectors are known as Ideographic Variation Selectors (IVS). They are not listed in the list of standardized variation sequence, instead they are listed in another Ideographic Variation Database. [3]
IVD collections
The following IVS collections are currently registered in the IVD: [3]
| Region | Name | Purpose | First registered | Last updated | Number of sequences | Chart |
|---|---|---|---|---|---|---|
 Japan | Adobe-Japan1 | CID-keyed Japanese OpenType fonts. Defines at least one sequence for every Japanese kanji from the Adobe-Japan1 collection present in Unicode, even for those with only one glyph, both as future-proofing and to allow that (Japan-region) glyph to be uniquely referenced. [5] | 2007-12-14 | 2022-09-13 | 14684 | |
| Japan | Hanyo-Denshi | Unicode characters corresponding to more than one glyph collected by the Han'yō Denshi program, a union of the character repertoires of the legacy kanji character sets used by multiple administrative systems in Japan (precursor to Moji Jōhō Kiban). [6] Approximately 60% of the initial registration matches Adobe-Japan1 glyphs, but the existing Adobe-Japan1 variation sequences are not used for them. [7] | 2010-11-14 | 2012-03-02 | 13045 | All Han'yō Denshi sequences |
| Japan | Moji_Joho | Unicode characters corresponding to more than one entry in the Moji Jōhō Kiban, a database of kanji used for administrative purposes in Japan. Supersedes and deprecates the Hanyo-Denshi collection, from which it retains 9866 of the existing IVSes. [6] | 2014-05-16 | 2017-12-12 | 11384 | All Moji Jōhō sequences |
 Macau | MSARG | Macao Supplementary Character Set (MSCS) | 2016-08-15 | 2020-11-06 | 154 | All MSCS sequences |
 South Korea | KRName | Standard character variants permitted in personal names in South Korea | 2017-12-12 | 36 | All Korean name sequences | |
 China | CAAPH | Variant forms required for digitization of intangible cultural heritage in databases and e-books by the Culture and Art Publishing House. [8] | 2025-07-14 | 198 | All CAAPH sequences | |
Proposed IVD collections
As of 23 October 2025 [update] , there are no IVD collection submissions under review. [3]
Similarly to the Moji Jōhō Kiban's role in Japan, the character repertoire of CNS 11643 (including draft revisions) is used for administrative purposes in Taiwan. [9] In some cases, multiple of these correspond to a single Unicode character. [10] Many of these cases are currently handled with mappings to the Supplementary Private Use Area. [10] However, the Taipei Computer Association, which represents the interests of Taiwan in the Ideographic Research Group, has been evaluating the feasibility of registering an additional IVD collection in the future. [10] [11]