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About
Learn Japanese with just 3 sentences a day, using brain science.
◆ Scientific Spaced Repetition
Review at optimal intervals based on the Ebbinghaus forgetting curve.
Day 0 → Day 3 → Day 7 → Day 14 → Day 30
◆ Just 3 Sentences a Day
Small habits create big changes. 5 minutes is all you need.
◆ JLPT N5 Essential Sentences
100 carefully selected sentences for Japanese beginners.
◆ Native Pronunciation
Listen and repeat with Text-to-Speech support.
◆ Offline Learning
Study anytime, anywhere without internet.
Start today. In 100 days, your Japanese will be different.
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What's New in Haru3
1.0
February 6, 2026




