It is developed by the editors of the Electronic Dictionary Project and aimed at translators.

Although the contents are technically the same, EDP refers to the accompanying Japanese–English database as Waeijirō (和英辞郎).

[citation needed] This resulted in a comprehensive database that grew to include over 1.66 million entries in the fourth edition.

Eijirō can be purchased online as either a CD-R or downloadable dictionary file for a comparatively low price.

In addition, an online version of Eijirō is provided free of charge through the SpaceALC Japanese portal.