世界中の人のための日本語学習

Read, listen, write, and speak Japanese with an AI senpai.

🔥 0 day streak

JLPT N5 → N1 • Business • Travel • Anime • Daily life

AI that adapts to your country, your accent, and your goals.

Practice natural Japanese with instant explanations, shadowing, handwriting, cultural notes, and spaced repetition tuned to your native language.

0Words mastered
0%Goal progress
0Kanji written
Not assessedCurrent path

Your first 10-minute win

Leave your first session with one sentence you can actually use.

Choose your goal, build a short plan, hear native Japanese, and get one AI correction.

Japanese for life in Japan and love of Japan

Choose your main world. Switch anytime.

職

Career in Japan

Interview, keigo, email, meetings, and workplace trust.

For talented global professionals who want to get hired, communicate clearly, and grow inside Japanese teams.

祭

Japan Culture World

Anime, games, manga, travel, food, daily life, and real friendship.

For people who love Japan and want language that turns curiosity into conversation, respect, and belonging.

Only in Kotoba Bloom

Not just language practice. A Japan communication operating system.

Japan Bridge Mode

Learn Japanese for trust, kindness, and real human exchange.

Daily bridge missions turn language into action: asking politely, thanking warmly, sharing your culture, and understanding the feeling behind Japanese communication.

Impact + growth engine

Help learners love Japan, then let their progress bring the next learner in.

Kotoba Bloom now turns study into shareable proof: bridge missions, culture confidence, career readiness, and a Japan Bridge Certificate that can spread naturally on social media.

World spotlight layer

A language app people can talk about, join, and share.

The Japan Love Challenge turns progress into short videos, certificates, creator missions, and real stories of people becoming able to communicate with Japan.

Goal architect AI plan ready
Next mission

Build your first AI plan

Tell Kotoba Bloom your goal and schedule. Your tutor will turn it into a realistic path.

Complete missions to unlock a premium reward box.
AI Growth Memory

Sign in to activate memory

Your saved conversations, words, listening practice, and missions will become a personal learning memory for the AI coach.

Saved learning 0 memories
Strength / Weakness AI Coach User-first

Find what you are good at

Kotoba Bloom watches your practice balance and helps you grow strengths while fixing the next bottleneck.

Natural Nuance Clinic

Your next weak point will appear here

The app focuses on the part that most blocks real communication: speaking, listening, vocabulary, writing, naturalness, or nuance.

Correct Japanese → natural Japanese コーヒーが欲しいです。 コーヒーをお願いします。

Both can be understood, but the natural version sounds better in a cafe.

Japan Fluency Passport Foundation

Measure what you can actually do in Japanese.

Practice count is not enough. Your passport combines conversation, listening accuracy, naturalness, culture/register understanding, and consistent study evidence.

0 evidence score
Next evidence mission Complete the Can-do check to find the fastest useful next step.
Real-life Can-do Check 5 abilities

Be honest. The AI uses weak evidence to make the next mission smaller and more effective.

User Love Loop Listening

Make every learner feel heard, helped, and excited to return.

Kotoba Bloom collects friction, delight, feature wishes, and confusion so the product can keep improving around real learners.

Kokoro Nudge Engine Gentle

Notifications that feel like a kind Japanese coach, not an alarm.

Short, positive nudges mix weak-point practice, culture, one useful line, and career confidence without spamming the learner.

Nudge settings Not enabled

Nudges are opt-in, positive, and designed to help learners return with curiosity.

Today

Ordering at a Tokyo café

Learn polite requests, counters, and natural café phrases with pronunciation drills.

AI Tutor Live practice