Observed arrival · 2026-10-23
あたまノート’s printable brain games
A free Japanese site for interactive and printable spot-the-difference, kanji, arithmetic, and quiz activities.
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◎Niche
◉Human
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- Families and care-facility activity coordinators
- Worth noticing
- Each A4 PDF puts the puzzle on page one and its answer on page two; the site also offers sets of ten at the same difficulty.
Field notes
On-screen play marks found differences with green circles, while the answer view marks all solutions in red; hints reveal locations one at a time. The homepage says each A4 PDF has the puzzle on its first page and the answers on its second, with name and date fields, and offers ten-question bundles at a single difficulty. It also says solved puzzles are remembered on the same device.
Observed signals
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Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
●ProPolished or operationally mature
◎NicheUnusually specific use
◉HumanPersonal, local, civic, or handmade
One card from the complete issue