Conditions Of Use


The System of Kanji Indexing by Patterns (SKIP) system for ordering kanji was developed by Jack Halpern and used as the main index for kanji in the New Japanese-English Character Dictionary (Kenkyusha/NTC, 1990) and The Kodansha Kanji Learner's Dictionary (Kodansha, 1999) and other dictionaries published by Kanji Dictionary Publishing Society.

The SKIP codes for the kanji not in the NJECD were compiled by Jack Halpern and Martin Duerst (the remaining kanji in JIS X 0208) and Jim Breen (the 5,801 kanji in JIS X 0212).

An overview of the SKIP system is available at this page.

Conditions Of Use

Creative Commons License

In 2007, Jack Halpern placed the SKIP coding system and all established SKIP codes under a Creative Commons Attribution-Noncommercial-Share Alike 3.0 Unported License. The Licence Deed can be viewed here, and the full Licence Code is here.

As stated in that licence, you "must attribute the work in the manner specified by the author or licensor." In the case of the SKIP system and codes, any publication, software package, WWW server or data file which uses or incorporates the SKIP codes must clearly attribute the system and codes to Jack Halpern, with a link to the website of the Kanji Dictionary Publishing Society at

The SKIP codes may not be used in commercial applications without explicit written permission to do so by Jack Halpern.

For example, the documentation of the software package, or the front-matter of a dictionary, should contain the following or equivalent words:

The SKIP (System of Kanji Indexing by Patterns) system for ordering kanji was developed by Jack Halpern (Kanji Dictionary Publishing Society at, and is used with his permission.

Jack Halpern
January 1, 2008