英語辞書・英和辞典・翻訳 - 英辞郎 on the WEB

Contains adsIn-app purchases
4.4
4.19K reviews
500K+
Downloads
Content rating
Teen
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About this app

◆For English dictionaries, English-Japanese dictionaries, Japanese-English dictionaries, and translation apps, choose "Eijiro on the WEB"! ◆
◇Contains over 2.36 million English-Japanese entries and over 2.67 million Japanese-English entries◇
◆An essential English app for English study, translation, and writing! With a wealth of example sentences, it's suitable for a wide range of English learners, from beginner to advanced◆
◇Recommended English dictionary and translation app for English learners looking to improve their reading comprehension and writing skills◇

\"Eijiro on the WEB" is recommended for those looking for the following English app! /
・People who want to use an English-Japanese or Japanese-English dictionary app to prepare for English qualification exams like TOEIC, Eiken, and TOEFL.
・Beginners in English who want to self-study by looking up phrases and example sentences, not just words.
・Practice English listening and pronunciation.
・People who want to efficiently acquire expressions useful for travel, study abroad, and business conversations.
・People who regularly write English emails and contracts at work.
・English translators, English teachers, and other professionals who use English in their professional fields.
・People who want to browse a wide variety of similar English expressions and choose the most appropriate English word or phrase.

[Key Features of "Eijiro on the WEB"]
■ Perfect for looking up English meanings! Powerful search methods
In addition to English-Japanese search, which allows you to look up Japanese meanings from English, and Japanese-English search, which allows you to look up English meanings from Japanese, you can also search for combinations of English and Japanese. It supports not only exact matches but also partial matches, and features powerful search functions such as AND, OR, and inflected forms. You can search not only for words but also for English example sentences and phrases, helping you develop natural English expressions.

■ Synchronization of your English vocabulary book with your PC browser
After registering an account and logging in, you can use "Eijiro on the WEB" to register not only the English words and phrases you searched for, but also their Japanese translations. Registered words and phrases can be managed by sorting and tagging, allowing you to create your own personalized English vocabulary book. Vocabulary book data is also synchronized with your PC browser, so you can view English words and phrases you searched for in the PC browser version in the app's vocabulary book.

■ Ability to listen to the English audio of your search terms
Not only does it display pronunciation and phonetic symbols to help you understand the accent, but you can also play audio by simply selecting a range.
*The audio playback within the app uses synthesized sounds generated by the OS, so the actual pronunciation may differ.

[What you can do with "Eijiro on the WEB Pro Lite," available with a free account:]
■ Register up to 100 words in your vocabulary list
■ Save up to 10 search histories
■ Search from over 210,000 English example sentences

[What you can do with "Eijiro on the WEB Pro," available with a paid account:]
■ No ads
■ Register up to 20,000 words in your vocabulary list
■ Save up to 50 search histories
■ Search from over 1.48 million English example sentences

*First-time subscribers of the latest version can use the service free for two weeks after purchase. You can cancel your subscription during the free period.
*In-app purchase price: ¥550 (tax included)/month (subscription) ¥5,500 (tax included)/year (subscription)
*You can also purchase "Eijiro on the WEB Pro" in the browser version.

-This service will be charged to your Google account via the automatic recurring billing feature.
・For information on canceling or changing your subscription, please visit "Google Play Help."
 https://support.google.com/googleplay/answer/7018481
・This service cannot be canceled for the current month of use.
・You must agree to the "Terms of Use" to use this service.
・An internet connection is required to use this service (dictionary data is not built-in).

※ "Eijiro" is a registered trademark of Sachiko Michibata.
※ For inquiries regarding this app and the web service "Eijiro on the WEB," please contact ALC, Inc.
Updated on
Aug 21, 2025

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
This app may share these data types with third parties
App info and performance
This app may collect these data types
Personal info, App activity and 2 others
Data is encrypted in transit
You can request that data be deleted

Ratings and reviews

4.4
3.96K reviews
Daniel Carter
October 16, 2021
I've used this service for a long time, and really appreciate it. Unfortunately, the app has recently had an insane amount of ads added to it - nearly half the screen is taken up with them, and sometimes full screen ads that are difficult to close are shown. I understand that it's a free app and that ads are necessary, but there has to be a reasonable limit. At this point I'd rather not use the service, in favour of others like weblio.
10 people found this review helpful
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Xiro Ar
March 8, 2021
As an English related business worker, Eijiro Pro has been my inseparable companion for many years. I really appreciate its vast and various entries. However, you have to bear in mind is that this this is an online open dictionary and you shouldn't trust too much it's contents just like Wikipedia.
3 people found this review helpful
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A Google user
April 5, 2019
This is great but would be greatest if I could look them up directly like a pop up or jump onto the definition on this on androids chrome. It's a bit a hassle to manually move to this apps and paste a word to do it. Apart from that this is most reliable relevant japanese-englsh dictionary you can find on the internet I assure.
8 people found this review helpful
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What’s new

軽微な修正を行いました