Nihongo is a 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.


* Over 170,000 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)

* Adds furigana or romaji to text pasted into the app.
* Tap on any word to see its definition without leaving the clipping.
* All clippings saved for later reading.
* 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.
* Customizable flashcards allow you to add furigana and/or romaji to words.
* Level up flashcards by studying every day.
* No penalty for missing a day of study, come back anytime.

* Search for words, kanji, and example sentences all in one place.
* 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 is free to download and use. Should you choose to upgrade to Nihongo Pro, we offer 3-month, yearly, and lifetime subscription options.

Payment will be charged to your credit card through your iTunes account at confirmation of purchase. Subscription renews automatically unless cancelled at least 24 hours prior to the end of the subscription period.

There is no increase in price when renewing.

Subscriptions can be managed and auto-renewal turned off in Account Settings in iTunes after purchase. Once purchased, refunds will not be provided for any unused portion of the term, and any unused portion of a free trial will be forfeited.

Read our full Terms of Service at

What's New

Version 1.12.1

* Support for full screen layout on new iPads.

Bug Fixes:
* Fixed an issue where attempting to purchase a lifetime subscription or restore purchases while not connected to the internet would give a not-useful error message.
* Fixed an issue where searching the dictionary for text that includes an apostrophe would not match any results.
* Fixed an issue where the screen would not scroll down when you hit the enter key to advance to the next note on a dictionary entry.
* Fixed an issue where rotating the screen on iPad would dismiss the radical keyboard.
* Fixed an issue when editing the name of a deck, where exiting the screen without tapping the "Done" button wouldn't save your changes.
* Fixed an issue where the "Start your Free Trial" button would erroneously fade in when the purchase screen loaded.
* Fixed an issue where the first tooltip in the Safari Extension tutorial did not point at the correct location.
* Fixed an issue where the colors of other app's custom share sheet UI would be messed up, when using the "Share With Friends" functionality.
* Fixed a potential crash when studying the first day of Middle School Kanji 2.

Ratings and Reviews

4.8 out of 5
204 Ratings
204 Ratings

Best App for Studying Japanese!!!

Hands down the best tool I have found for use as a companion to my Japanese studies. I’ve been able to increase vocabulary and improve my reading skills tremendously through daily use of this app. Taking a photo of Japanese text, using Google translate to turn image into text, then importing that text into a clipping is a very powerful way to improve reading and vocabulary. The words in the clipping are also then automatically compiled into flash cards for study. Wow, easily worth the cost given the increased productivity in learning Nihongo!!!


Best Japanese learning app

This is the best Japanese learning tool I know of. The dictionary is great. But if you only use it as a dictionary, then you’re badly underestimating the power of this tool. With the clipping analysis and safari extension, this is a self contained learning platform, where you can read, learn new words, and review them by flash cards later on. It’s worth upgrading to pro version.

One thing needs to be improved is to add a sync feature. It would be good to be able to sync clippings and word decks across iPhone and iPad.


This is my go-to dictionary

I use google translate as well, but this app seems to find the correct meaning better than even google translate. I like that I can search either English or romaji terms in the same search box.
My only regret is that I did not buy this app when it was less expensive. I have the lite version and find the pricing to be too expensive for pro.


Serpenti Sei LLC
258.1 MB
Requires iOS 11.2 or later. Compatible with iPhone, iPad, and iPod touch.
English, German, Simplified Chinese, Spanish
Age Rating
Rated 4+
© 2018 Serpenti Sei LLC
In-App Purchases
  1. Nihongo Pro (Lifetime) $49.99
  2. Nihongo Pro (Monthly) $2.99
  3. Nihongo Pro (Annual) $19.99


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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