Optional account
Keep every study win backed up.
Use JLPTBooks without an account, or sign in when you want safer progress, profile settings, and study history across devices.
Local-first progress stays on your device
Cloud backup when you choose to sync
Profile settings for your target JLPT level
Email preferences you control
Log in to JLPTBooks
Use the same email and password you created for your JLPTBooks account.
or