This page contains infomation about the development
of a Postgresql database to support Jim Breen's Japanese-English dictionary
Jim runs these projects under the auspices of the
Electronic Dictionary Research and Development Group
The goals of this project (in priority order) are:
Discussion of this project takes place on the firstname.lastname@example.org
Jim Breen maintains a web page describing the JMdict project's
use of JMdictDB at
There is also some older information at
The project code is still undergoing active development and no
promises are made regarding stability or backward compatibility.
However, it is currently in use as the primary repository for the
JMdict project dictionary data and the web interface is in use for
submitting new entries and corrections to existing entries in WWWJDIC.
All the code developed for this project is GPL'd and maintained
in a publicly accessible Mercurial repository (links below).
Additional help is welcome; please post to the edict-jmdict
mailing list, or email the current principal developer at the
address at the bottom of this page.
The code currently consists of scripts to create and load JMdict (and
related data such as the JMnedict "Japanese names" file, or the Tatoeba
"examples" file) into a Postgresql database, some maintenance and other
command line tools, and a set of CGI scripts to allow access and updating
of the database using a web browser. The code was originally written in
Perl but was migrated entirely to Python in May 2008. The code
is developed and tested under Ubuntu Linux and Fedora 15 (both with Apache
web server), and Microsoft Windows XP (with IIS web server). More
information on prequisites is in the README.txt file.
- To create a database to serve as a master repository for the
information in the JMdict, EDICT, JMnedict, Examples, Kanjidic
and other related files distributed by Jim Breen and the EDRDG.
- To provide a web-based system for the submission, review, and
approval of corrections and new entries to these data.
- To provide freely available software to others who want to use
or build upon, "JMdict in a database".
- To provide an open-source replacement for the principal author's
Microsoft Access based JMdict database. :-)
The EDRDG project's JMnedict Japanese names dictionary is now being maintained
in the JMdictDB database alongside the JMdict dictionary. The official
After a long discussion on the Edict mail list
new part-of-speech tags have been added to the words だ，くれる and
[*]良い・いい allowing them to be correctly conjugated by the JMdictDB
conjugator. Other minor tweaks have been made such as not showing the
Conjugations link if there are no conjugations available.
Xrefs are now shown in a more consise way: there is only one
"Cross References" section and the direction of each xref is show
with an arrow: right for normal xref, left for a "reverse" xref,
and double-headed arrow for bi-directional (xrefs on two entries,
each pointing to the other).
The JMdictDB code running on Jim Breen's wwwjdic servers has been updated
to the latest version running under Python3. The new version contains
JMdictDB source code has been updated to run with Python-3.3. The
last Python-2 compatible revision was tagged "py2maint" (2012-06-17).
Because wxPython is still not available for Python-3, the two wxPython
apps in JMdictDB (tools/jmedit.py and python/srch.py) will not run until
a Python-3 compatible version of wxPython is available.
- * Word conjugations
- Like the [V] link in wwwjdict but
a completely independent, data-driven implementation. Provides
the conjugated forms in both kanji and kana. Conjugates adjectives
and "da" in addition to verbs.
- * Keyword expansions
- Hoovering your mouse over keywords like
'ok' or 'pn' will now (on most browsers) show the long description
("out-dated or obsolete kana usage" or "pronoun" for those two
Try it !
Access to the online test version of JMdictDB.
(Note that these links are to the web pages provided in the JMdictDB
source code. The pages linked to from WWWJDIC are very similar but
have been tweaked to the needs of WWWJDIC.)
Find and edit existing entries: search /
Add a new entry
Please feel free to try these out, including adding any real or junk
entries you want, but be aware that all changes will be thrown away
periodically and will NOT go into the real JMdict.
Code and Documentation
-- Browsable (read-only) access to the JMdictDB code Mercurial repository.
-- Issue tracker for the JMdictDB project software.
-- Download source code, latest development version (gzipped tar file).
-- The README file, includes install prerequisites and instructions (2010-03-10)
-- Comprehensive description of the database schema (2008-11-12).
-- Diagram of the database schema (200KB, 2008-11-12).
-- Source code for last version implemented in Perl, obsolete, 2008-05-03 (gzipped tar file).
Related files, but not part of JMdictDB...
The following HTML pages list all jmdict entries that share a common
kanji or reading text with at least one other entry. The entries
are sorted by the text making it relatively easy to identify
enties that are very similar and possibly should be merged.
This data is based on the 2007-01-14 version on JMdict.
Shared kanji (800KB)
Shared readings (10MB)
Matchup of Kale Stutzman's 2007-01-14
google hit counts and corresponding JMdict entries
README.txt (also included in the .zip files)
kale-u.zip UTF-8 encoded files
kale-w.zip SJIS (Windows) encoded files
Kale Stutzman's original data file in alternate encodings:
edict-gfreq.euc EUC-JP encoded
edict-gfreq.utf UTF-8 encoded
Please send questions or comments about these pages or the JMdictDB
project in general to:
Stuart McGraw <email@example.com> (remove the two x's)