Learn Japanese on Live Lingua

Live Lingua used to specialize in so-called "public domain" courses - it used to be a database of language learning material that is not copyrighted. Now, the platform offers 1-on-1 language courses in select languages, they offer to put you up with a handpicked, native tutor. Currently, they have an offer for a free first class in Spanish.
Price: depends
Devices: Web

Learn Japanese on Ling

Ling's app has features that make learning fun and easy. Whether you're a beginner or an experienced speaker, Ling has something for everyone. You learn at your own pace with tons of lessons, vocabulary lists, and quizzes. You can even practice your conversation skills with their chatbot.
Price: Free
Devices: Android, iPad, iPhone, and Web

Learn Japanese on Mango Languages

Mango Languages uses algorithms to offer a personalized language learning experience. Language learners can speak and hear the language they are learning, participate in daily quizzes to reinforce their progress, and even engage in live conversations with native speakers around the world. Language instructors also use Mango Languages to create customizable lessons tailored to each student's current skill level.
Price: $6.67/month
Devices:

Learn Japanese on 50 Languages

50 Languages is a mobile app that offers users a variety of features that make learning a language relatively easy. From pronunciation guides to verb conjugations, 50 Languages has a good set up to deepen your knowledge of your desired language. The app is free to download but you have to pay to remove ads.
Price: Free
Devices: Android, iPad, iPhone, and Web

Learn Japanese on Clozemaster

Summary: Clozemaster is a Web & iOS app that helps language learners practice and learn new words using fill-in-the-blank sentences. It's another gamified app like Duolingo.
Price: Free
Devices: Android, iPad, iPhone, and Web

Learn Japanese on Tandem

Tandem is a free platform with a simple premise: there is probably someone out there who is learning your native language, and whose native language you want to learn. So they put you in touch with them. When you sign up, Tandem will review your application to make sure their platform remains safe and that the person you get matched with is also a keen language learner.
Price: depends
Devices: Android, iPad, iPhone, and Web

Learn Japanese on Awabe

Awabe is a flashcard language learning app on Android. It focuses on vocabulary, offering as much as 4,000 words for each language.
Price: Free
Devices: Android, iPad, and iPhone

Learn Japanese on Rosetta Stone

Rosetta Stone is a language-learning app that started in the 90s for auditory learners.
Price: Free
Devices: Android, Apple Watch, iPad, iPhone, and Web

Learn Japanese on LingQ

LingQ is a language learning app that uses the same logic for learning a new language as learning your native tongue: using content you already like. They have books, news, podcasts, sports coverage, politics, culture, and food to name a few.
Price: Free
Devices: Android, iPad, iPhone, and Web

Learn Japanese on HelloTalk

HelloTalk is a language learning app that allows users to communicate with others in different languages. It has both a free and premium version, and offers a variety of features to help users learn new languages.
Price: Free
Devices: Android, iPhone, and Web