Ages 5–12 · Browser-based · AI-powered

A Japanese city where
every story is new

Children explore Tsubaki-chō — a magical pixel art Japanese city — while AI-generated stories, lessons, and quizzes are created fresh every single visit. No two sessions are ever the same.

Start your 30-day free trial See how it works

The city is in active development — register now and we'll contact you when the game opens.

Districts to explore

One city, multiple neighborhoods — each with its own NPCs, stories, and games. Ride the train to your next adventure.

Explore districts & the world of Tsubaki-chō

Launch district
⛩️

The Shrine Quarter

Torii gates, bamboo paths, a zen garden, and an onsen pavilion. The Kitsune Shrine Keeper, the Forest Tanuki, and the Tengu Scholar each teach through Japanese folk tales and nature stories — and tell a different story every visit.

Reading Science Mindfulness Cultural studies
Coming soon
🏮

The Festival Grounds

A perpetual matsuri — ring toss alleys, takoyaki stalls, a real arcade with playable games, and a taiko stage. Kids don't feel like they're doing math. They feel like they're winning at the festival.

Math Logic Cultural studies
Coming soon
🏙️

The City Streets

A bustling modern Japanese neighborhood — a school, a bakery, a corner store, and a game shop window that shows new releases every season. The baker always has new problems to solve.

Reading Math Social studies
Ages 10–12 · Parent unlock
🦊

The Yōkai Quarter

Dark backstreets, overgrown shrines, and spirits with stories to tell. Spooky atmosphere, not horror — Japanese mythology and kaidan folk tales for older readers. Parent-controlled unlock in the dashboard.

Advanced reading Mythology Critical thinking
🌀

Mysterious torii gates at the city's edge glow faintly. Future updates will open portals to other worlds — a European fairy tale kingdom, a French village, and beyond. The city is the foundation. The multiverse is the roadmap.

A city that's always changing

Tsubaki-chō isn't a classroom. It's a place — and like any place worth living in, it keeps getting better.

十空ゲーム Arcade

A real arcade inside the Festival Grounds. Racing games, shmups, platformers, puzzle cabinets — new releases drop seasonally. The high score board is in Japanese numerals. Reading it is optional. Beating it is not.

Game Shop Window

The City Streets game shop posts new release posters each season. Kids see what's coming before it drops. The window is always one game ahead of the arcade — and the anticipation is the point.

Seasonal Events

Tanabata lights up the Festival Grounds in June. Obon brings the Yōkai Quarter to life in October. New Year transforms the station. The city dresses for every season — and there's always a reason to come back.

How it works

Simple for parents, magical for kids — no installs, just a modern browser.

Full guide: how it works

1

Create

Parent account, curriculum track, and child profiles using nicknames only — we take child privacy seriously from the very first screen.

2

Explore

Your child walks through Tsubaki-chō, rides the train between districts, and meets NPCs who always have something new to say.

3

Play & Discover

Race in the arcade, beat the high score, hear the Kitsune's new story, solve the festival stall puzzle. The content is fresh every visit — and the city keeps getting bigger.

Why AI-generated content changes everything

Every other children's learning platform has a fixed content library. Kids finish it, get bored, and churn. The platform has to spend millions producing more content just to keep up.

Book Fairy Tales generates fresh stories, comprehension questions, math problems, and cultural riddles on every visit — powered by Claude AI. The Kitsune Shrine Keeper tells a different folk tale every time your child visits. The festival math stall has new problems every session.

Same NPC. Different story. Every visit. Forever.

∞ Stories per NPC
0 Repeated sessions
K–6 Grade levels covered

Why AI-generated learning matters — full guide

Built for families

Trust is part of the product — not an afterthought.

Safety, privacy & parent tools

🔒

COPPA-aware design

Parent accounts are created first. Child profiles use nicknames only — never full names. Verifiable consent is built into every step of registration.

📋

Parent content log

Every AI-generated story and quiz your child sees is logged in your parent dashboard. Review any session, any time — full transparency on what the AI produced.

🚫

No ads, ever

No advertising. No in-app purchases. No behavioral tracking. One subscription covers everything — no surprise charges.

🎛️

Parent controls

Lock or unlock districts by age, adjust grade level settings, manage curriculum tracks, and review weekly session summaries from your dashboard.

Pricing

Simple family pricing from our business plan — confirmed at checkout when subscriptions go live.

Full pricing & early access

Monthly
$9.99 /month
  • Up to 3 child profiles
  • All districts as they launch
  • Parent activity log
  • District unlock controls
Notify me at launch
Best value
Annual
$79 /year
That's $6.58/month
  • Everything in Monthly
  • Lower effective monthly rate
  • Priority features as we ship
Notify me at launch
Free trial
30 days
  • Full access during trial
  • COPPA-aware signup flow
  • Cancel any time before billing
Create account

Be the first to explore Tsubaki-chō

We're finishing the Shrine Quarter first. Register now and we'll email you the moment the city opens its gates.

Create account

No payment required to register. We'll remind you before any billing starts.