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Nihongo: a modern Japanese dictionary & study tool

By Serpenti Sei LLC

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Nihongo is a Japanese-English dictionary and study tool, designed to make the best use of the time you dedicate to studying Japanese.

Our dictionary is made to find what you're looking for fast, with the words Japanese speakers actually use at the top of every search result. If you're trying to read something longer, paste it into a Clipping, and we'll turn every word into a link to its definition, and even add furigana.

Studying from a "core" list of vocabulary words can be difficult, because you lack any context for the words you're studying. Instead, Nihongo generates vocabulary lists from the words you look up in the dictionary, and the texts you're reading via Clippings. Context is the key to remembering vocabulary, and with Nihongo, every word you study has context.

* Search for words, kanji, and example sentences all in one place.
* Automatic search conjugation allows you to search for 食べさせられました and find 食べる.
* Our smart search algorithms help you find the word you're looking for faster.

* Over 170,000 words, 165,000 example sentences, and 6000 kanji entries.
* Every word is marked as common, uncommon, or rare, so you can focus on the words Japanese speakers actually use.
* Kanji entries give quick access to the words associated with common readings.

* Tired of looking up words one-by-one? Paste in Japanese text, and we'll turn every word into a link to its definition, and add furigana.
* All clippings are saved, so you can come back and finish reading later if you need to.

* Nihongo automatically generates flashcard decks from your clippings and your dictionary history, so you can focus on studying the words you're actually using.
* Our unique learning system is easier to use than other spaced repetition systems. We don't penalize you for missing a day, so you can stop and start whenever's convenient for you.
* Every word in Nihongo has a level, and the more you study the more you level up. Just pretend you're grinding towards that relic weapon.
* Kanji flashcards include a drawing area, so you can test your ability to write kanji. We prompt you to fill in the missing kanji from words you already know, so you always have context for what you're studying.

* Nihongo is great for professional translators and advanced learners. Nihongo learns what words you know, and lets you focus on the words you don't.
* Create a Clipping from a long piece of text, like a chapter of a book, and with Nihongo you can study just the words from the text you don't already know.
* Rather than studying every word you don't know, sometimes you want to study just the words that show up a lot. With Nihongo, you can create decks that only include the frequently used words in a piece of text.

Nihongo is built on data from JMDict (, Tatoeba (, and KanjiVG ( I encourage you to contribute to these great open source projects that make apps like Nihongo possible.

What's New in Version 1.7.2

More bug fixes.

New in Nihongo 1.7:

This update is all about adding some of the most commonly requested features in the Dictionary section of Nihongo!

* Recent Searches - View a history of searches you've made so you can get back to definitions faster.
* Word Commonality in Search Results - Circle for common, Diamond for uncommon, Star for rare. Quickly find the words that Japanese people actually use.
* Audio Pronunciations (Available with Pro Upgrade) - Hear natural Japanese pronunciations of words, example sentences, and Clippings.
* Updated dictionary content, with over 2000 new entries.

We've also renamed our in-app purchase in this update to Nihongo Pro. If you previously purchased unlimited flashcards and clippings, the new audio pronunciations feature is yours for free. =)

P.S. If you like Nihongo, please consider rating it in the App Store!


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Customer Reviews

One of the best Japanese dictionaries available.

Very beautifully and carefully designed UI. Word look-up is flawless; English, Japanese, or Romanji recognition with instant results. In-sentence usage examples for every word on each page makes studying in context very useful and effortless.

Kanji breakdowns are very helpful as well. Anki-style flash cards could be a great tool to some, although I have not used this feature much.

The only thing missing I can think of is adding verb and い adjective conjugations.

All in all, a wonderful tool I will be using for the foreseeable future. Great job developers.

The Best Japanese Dictionary

I'm blown away at how simple and accurate and useful this app is. It does have some in app purchases but there are no ads, and the premium features are entirely optional. Support this developer! This is how you make an app.


Great functionality, love the pronunciation for beginners, excellent example sentences.

Nihongo: a modern Japanese dictionary & study tool
View in iTunes
This app is designed for both iPhone and iPad
  • Free
  • Category: Reference
  • Updated:
  • Version: 1.7.2
  • Size: 227 MB
  • Language: English
  • Seller:

Compatibility: Requires iOS 9.0 or later. Compatible with iPhone, iPad, and iPod touch.

Customer Ratings

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Top In-App Purchases

  1. Nihongo Pro$7.99