Top 5 Most Popular AI Learning Apps in Japan

In recent years, the demand for AI-powered learning apps has been rapidly growing in Japan. These apps are gaining attention as highly efficient tools for practical learning with clear objectives, particularly for exam preparation, certification tests, and improving English skills. AI-based tools that suggest optimal learning paths based on individual comprehension levels and study history have become invaluable for both busy students and working professionals.

In this article, we introduce the top 5 most popular AI learning apps in Japan as of 2025. We also explore how these apps align with Japan’s unique educational culture and learning styles, offering insight into what makes them so widely supported.

AI Learning App Ranking

(*Ranked Based on Install Count)

1. Duolingo
2. Speak
3. QANDA
4. SpeakBUDDY
5. Praktika

1. Duolingo

Source: Duolingo Homepage

Duolingo is a globally popular language learning app that leverages AI technology and is widely used across all age groups in Japan. One of its standout features is its personalized learning function, which adjusts questions based on each user's response patterns and proficiency level. The AI analyzes learning data in real time to help users efficiently overcome weak areas.

Additionally, Duolingo utilizes speech recognition AI to support accurate pronunciation, enabling users to develop more natural speaking skills. Its gamified features are also designed to encourage daily learning and help maintain motivation. With support for a wide variety of languages, Duolingo’s flexibility as a global platform is another key strength.

2. Speak

Source: Speak Homepage

Speak is an innovative language learning app that specializes in AI-powered interactive English conversation training. Its most distinctive feature is the ability to build practical English skills through natural conversations with AI characters. The AI analyzes users' speech in real time and provides immediate feedback on grammar, vocabulary, and pronunciation errors.

What makes it even more effective is the personalized conversation content, which evolves based on each user's learning history. With repeated practice, learners gradually develop more natural response skills. As speech recognition and natural language processing technology have advanced, the app now delivers an immersive experience that feels like talking to a real native speaker.

For learners who struggle with speaking, Speak can be a highly supportive and motivating partner.

3. QANDA

Source: QANDA Homepage

QANDA is an AI-powered learning support app that focuses on problem-solving, particularly in subjects like math and science. Its standout feature is the ability to instantly provide answers and explanations just by taking a photo of a handwritten question. Using a combination of image recognition and natural language processing, the AI analyzes the problem and suggests the most effective solution.

The explanations are clear and detailed, designed to help deepen the learner’s understanding. In addition, the AI reviews past search history and common mistakes to identify areas of weakness, making it easier for users to recognize their trouble spots and review more efficiently. QANDA is gaining attention as a tool that promotes independent learning through AI support.

4. SpeakBUDDY

Source: SpeakBUDDY Homepage 

SpeakBUDDY is Japan’s first English learning app designed to strengthen speaking skills through conversations with AI characters. It offers instant feedback on dialogue and tailors conversations to match each learner’s proficiency level. The AI uses speech recognition to analyze spoken content and scores users based on pronunciation and fluency of expression.

The app also features personalized learning suggestions based on individual weaknesses, along with automatically generated conversation scenarios tailored to different situations. A combination of natural language processing and machine learning powers this personalization. With support for various practical contexts, such as business English and travel conversations, SpeakBUDDY stands out for its unique blend of real-world usability and advanced AI technology, offering a next-level language learning experience.

5. Praktika

Source: Praktika Homepage 

Praktika is an English learning app focused on real-time conversation training with AI, offering an experience that feels remarkably close to speaking with a native speaker. The app features avatar-based AI tutors who engage users in conversations based on real-life scenarios.

The AI instantly analyzes pronunciation, grammar, and vocabulary usage, providing clear feedback both visually and through audio. Conversations are also personalized based on each user’s learning history, with future dialogues adapting accordingly.

This allows learners to improve their practical English speaking skills from the comfort of their home. As a result, Praktika is quickly becoming a new standard for language learning across multiple languages, driven by its innovative use of AI.

Conclusion

Japan’s top 5 most popular AI learning apps offer advanced tools that meet a wide range of learning needs, from language acquisition to problem-solving. Apps like Duolingo, Speak, and SpeakBUDDY enhance speaking skills efficiently through AI-powered, personalized learning and real-time feedback. At the same time, QANDA supports a more profound understanding of math and science through image recognition-based problem-solving.

Praktika builds real-world communication skills by simulating lifelike conversation scenarios, creating an experience that feels like speaking with a native speaker. These apps are also handy for English speakers learning Japanese, as they provide effective, personalized learning environments powered by evolving AI technology.

If you’re aiming for deeper and more effective learning, these tools are worth a try.