Kenkyusha’s New Japanese-English Dictionary 5th Edition (EPWING)


Kenkyusha’s New Japanese-English Dictionary (新和英大辞典 Shin wa-ei daijiten) is the most authoritative and largest Japanese-English dictionary. This dictionary is used by mostly translators, teachers, students, and specialist of Japanese language. This dictionary is also known as Green Goddess because it has green cover. The fifth edition was published in 2003, contains about 480,000 entries with almost 3,000 pages, that is more than JMdict. This dictionary also contain about 100,000 compound words, and 250,000 example phrases and sentences, nearly all of which accompanied by English translations.

Kenkyusha’s New Japanese-English Dictionary (新和英大辞典 Shin wa-ei daijiten) also available in EPWING format, online, and in electronic dictionary (e.g. Casio, Canon, Seiko, etc.) and iPhone app.


Compared to the 1974 fourth edition, the fifth edition represents a dramatic increase in the number of definitions (from roughly 290,000 terms to 480,000 terms). Furthermore, the organization of the words has changed from an alphabetical romaji-style system (「ローマ字見出し」方式) to the kana-based system (「かな見出し」方式) that is most commonly used in Japanese dictionaries and encyclopedias. This change reflects the fact that most users of the dictionary are native speakers of Japanese, who are more comfortable with the kana-based lookup system.

Other new features are:

  • Larger numbers of katakana words and onomatopoeia words (e.g. ペラペラ perapera, ニコニコ nikoniko)
  • More colloquial slang and pop culture words (a new definition: オブラデ・オブラダ 「曲名」 Ob-LA-Di Ob-La-Da)
  • More specialized scientific and technological words (especially related to the recent Internet boom)
  • More names of famous people, places, works of art, works of literature, etc.
  • English translations that are more up-to-date and idiomatic, reflecting the greater participation of native English-speaking editors in the editorial process than for previous editions

The definitions themselves are also more expansive and detailed, as they often now include sample sentences.

For example, under the definition for オフ・シーズン (off-season), a katakana word borrowed from English:
オフ・シーズンにはそのホテルはぐっと安くなる。 The off-season rates are much lower at that hotel.

Furthermore, there are also accompanying pictures and diagrams for words such as 馬 (horse) and サッカー (soccer).

At the end of the dictionary, there are some useful resources such as the entire Japanese Constitution; a chronological list of dates in Japanese history dating all the way back to the stone age; a chronological list of dates in world history dating all the way back to the early civilizations that developed in Mesopotamia, the Nile valley, the Indus valley, and the Yellow River valley; charts on the proper formats of notices, envelopes, application letters, resumes, etc.; a section on email lingo and abbreviations; a section on the proper format of business cards; a section the proper format of help-wanted ads; a section on Japanese government titles; a section on American government titles; a chart on pronouncing Japanese kanji in Chinese; charts on the hierarchical organization of the Self-Defense Forces, the old Japanese military, the American military, and the English military; a chart on the names of all the countries in the world (along with currencies and measurement systems); and finally, a conversion chart between U.S. systems of measurement and the metric system.

The online version of the dictionary, available for a fee, is being updated on a monthly basis with new words and expanded entries.


This dictionary only Japanese to English, not vice versa. So, you cannot search with English word as prefix and also you have to type the search query in Japanese writing (kanji, and hiragana/katakana). However, you can still use English keyword or roman characters by change search type in EBWin from Prefix to Full Text (it takes more time to display the result).

Download Kenkyusha Japanese-English Dictionary 5th Edition EPWING

How to view EPWING Dictionary file format

To view dictionary in EPWING format, you need a viewer. The best viewer to view EPWING format is EBWin4 for Windows. Follow instructions here about how to download EBWin4 for Windows and how to add dictionaries.


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