Nihongo - Japanese Dictionary 4+

with SRS flashcards and OCR

Serpenti Sei LLC

Designed for iPad

    • 4.8 • 778 Ratings
    • Free
    • Offers In-App Purchases



Nihongo is an offline Japanese dictionary, flashcard app, and reading assistant, 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, and every word marked as "common", "uncommon", or "rare".

"Clippings", our reading assistant, is what makes Nihongo stand apart from other dictionaries. Paste in Japanese text from a website, email, an eBook, or anywhere else, and we'll add furigana or romaji to every word. We also enable you to tap on any word to see its definition. This will truly change the way you read Japanese. And now, you can get the same experience right in Safari using our Safari extension.

Personal experience (as well as a good deal of research in second-language acquisition) has shown us that the words that you're most likely to remember are the words that you're encountering naturally. To this end Nihongo automatically draws from your search history and clippings to compile flashcard decks filled with words for which you already have context. This makes it easy to study both the words you looked up during Japanese class, and those that appear in your favorite song or videogame. And by adding notes to the back of flashcards you can further connect each vocabulary word to your personal contextual understanding.

Kanji flashcards prompt you to draw the missing kanji from the words you're studying, creating stronger connections between the characters and their real-world use. Built-in kanji decks give you 2 or 3 key words to study for each kanji.

This app is only possible because of the JMDict ( and Tatoeba ( projects. I highly encourage you to support these incredible projects that make apps like Nihongo possible!

* Over 180,000 words, 165,000 example sentences, and 6000 kanji entries.
* Every word clearly marked as common, uncommon, or rare.
* Add your own notes to any dictionary entry.
* Quickly identify transitive/intransitive word pairs.
* Audio pronunciations of words and example sentences (Requires Nihongo Pro)

* Look up words just by taking a picture.
* Uses Google Cloud Vision to provide high-quality text recognition.
* Just tap on a word to look it up.

* Adds furigana or romaji to text pasted into the app.
* Tap on any word to see its definition without leaving the clipping.
* Flashcard deck automatically created so you can study the new words in a clipping.
* Display text horizontally or vertically.
* Have Nihongo read any clipping out loud.

* Flashcards automatically generated from words you lookup in the dictionary or paste into the app.
* Nihongo learns what words you know, and won't bother you again with words you've mastered.
* Built-in kanji flashcard decks up through Middle School.
* Intuitive spaced repetition flashcard system for vocabulary and kanji drawing.
* Level up flashcards by studying every day.
* No penalty for missing a day of study, come back anytime.

* Search using English, Japanese, or romaji.
* Supports searching for conjugated words in both English and Japanese.
* Search for kanji using radicals and stroke counts.

* Add furigana or romaji to webpages.
* Tap on words to see definition within Safari.

Nihongo Pro Terms of Use
Read our full Terms of Service at

What’s New

Version 1.28.7

* Paste and Clear controls on the clippings screen have been redesigned to accomodate the new paste button introduced in iOS 16.

Bug Fixes
* Fix an issue where tapping on the (i) button on the flashcard menu would not update the displayed selection.
* Fix behavior on flashcard menu where selecting a deck would shift the scroll position, and on iPad would animate the selection a second time.
* Fix issue where downloaded speech voices would not appear as selectable on iOS 16.
* Fix an issue where the Nihongo Pro purchase screen would not be scrollable if it was opened before products were loaded from the app store, did not overflow the screen when the loading indicator was visible, and did overflow the screen once the loading indicator was replaced with the available products.
* Fixed an issue where the purchase screen could indicate the availability of the 14-day free trial even though it had already been used.
* Fix an issue where there was a horizontal blue line on the purchase screen on iOS 16.
* Fix an issue where Nihongo debug URL's (used for support) would not work on iPad.
* Fix issue where romaji and sync icons are out of alignment with the rest of settings on some devices on iOS 16.

Ratings and Reviews

4.8 out of 5
778 Ratings

778 Ratings

Brandea199 ,

Best app for Japanese vocabulary

When I first purchased I was a bit skeptical on whether the one-time full purchase was worth it, but this app is definitely one of the best when it comes to Japanese vocabulary.

It has a clean UI, it’s easy to use, and has extremely helpful writing/flashcard sections that truly drill memorization. The developer, Chris, is also extremely responsive to feedback and is clearly passionate about improving and maintaining the quality of the app.

Highly recommend purchasing if you’re serious about learning Japanese. It’s such a quick and easy to use resource; having it on hand at all times for refreshers, vocabulary drills, or dictionary lookups is truly worth it.

Thisprogramsucks ,


I purchased the app for 3 months and as a dictionary if you know Hiragana works fine. However it’s use of romanji sometimes is off (eg du for zu) I will probably end up buying the app permanent more for it flash cards to review words that I have looked up (a nice feature) however it has some irritating problems and mistakes. 1) the Kanji at times when it gives examples in its usage is outright wrong. You click the Kanji word and a different Kanji appears. 2) Also the example sentences they give with certain word seems to be computer generated so that even more complex words are added to the sample sentence making the sample sentence incomprehensible at times. It seems that a sentence would be generated to use as much complex words as possible so it can be reused for other examples. 3) The sample sentence does not include the the translated word, making me wonder whether the meaning given by the dictionary is correct. eg try look up Osameru/ Osamaru. Has potential to be a five star application but would try the application for a few months and make sure you can tolerate the mistakes.

Diamond Vercetti ,

Great, but some suggestions..

I love this app. I’ve been using it for a while to store my heard words and use them to make sentences for anki decks.

What I wished was available as a feature is searching words by frequency. For example, having a section for common words, a section for uncommon, a section for rare etc

Also, it would be nice to be able to browse the JLPT words at once by category without having to learn through the integrated in app SRS. For example all N4 words would be in a list to see what you’ll be studying.

Developer Response ,

Thanks for this feedback, I'll consider it for a future update!

App Privacy

The developer, Serpenti Sei LLC, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Linked to You

The following data may be collected but it is not linked to your identity:

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  • Usage Data
  • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    Some in‑app purchases, including subscriptions, may be shareable with your family group when Family Sharing is enabled.

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