大丈夫

The ticket gate just flashed red.
Everyone's behind you. Breathe.

Is ¥6,880 a lot? Do I tip here? Are my tattoos okay at the onsen? Japan is magical — and, in the moment, completely confusing. JapanCalc answers those moments as they happen. And while it does, it quietly keeps your thirty fleeting days — so your trip ends as a story, not a blur. $4.99, once.

Get JapanCalc — $4.99 Or just scroll. There's no rush here.
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What's really on your mind

Guidebooks tell you where to go.
Nobody tells you what to do when you get there.

No. 01

"Is ¥6,880 a lot?"Yen math is hard to do at speed — and you shouldn't have to choose between paying attention to the moment and paying attention to your wallet.

No. 02

"Can I keep my shoes on? Is tipping rude?"The questions you can't quite ask a stranger are the ones that follow you the whole trip.

No. 03

"The gate just flashed red, and there's a line behind me."Japan's rail network runs on precision — right up until the one moment it isn't obvious, and everyone's watching you figure it out.

No. 04

"Three months from now, will I remember which day was which?"The trips that fade fastest are the ones nobody wrote down while they were happening.

The yen is weak right now — this might be the best time to visit Japan in years. But value isn't the same as ease. We built one quiet app with four tabs, so every one of these moments has an answer before you even finish asking.

Dōgu — the tools

A good tool doesn't announce itself. It waits in your pocket, and it's simply there at the exact moment you need it.

TAB 01 / PRICE
NEDAN — THE PRICE
¥ ↔ USD & more · Shopping 10% / Take-out 8% · works offline

That bowl of ramen looks perfect.
Now you'll know exactly what it costs.

Instant conversion between yen and your home currency, in a calculator that opens in under a second. One tap flips between Shopping 10% and Take-out 8% tax, so the number you see is the number you'll pay. No ads, no spinner, no signal required.

That moment you realize the omakase dinner costs less than a sandwich back home — JapanCalc makes sure you never miss it.
TAB 02 / ASK
SHITSUMON — ASK ANYTHING
Ask anything about Japan — AI answers, right where you stand

"I'm at Nagoya Station.
Where's good ramen near me?"

Ask exactly what you're wondering, the way you'd ask a friend — and because ASK knows where you're standing, the AI answers with real places and real directions, not a generic list.

Tipping, tattoos, onsen etiquette, what that button on the toilet does — the questions you can't ask anyone are the ones it answers best. Ask in your own language, too; JapanCalc speaks eight.

A guidebook answers the questions you thought of at home. ASK answers the one you have right now, on this street corner.
TAB 03 / HOW TO RIDE
KAISATSU — THE GATE
Route Finder · 🆘 Trouble? · IC Card · Transfer

Every train in Japan
goes somewhere beautiful.

One tab, four kinds of help. Route Finder asks AI for the route between any two stations — transfers, time, fare. 🆘 Trouble? gives instant answers when the gate flashes red or your card comes up short. IC Card demystifies Suica and PASMO. Transfer walks you through the maze between lines — and if you're not sure a JR Pass is worth it, it'll do that math for you too.

Japan's trains are famously precise. This just makes them as easy to use as they are to admire.

Day one, you'll follow the app. Day three, your friends will be following you.

There's a fourth tab.
It's been working quietly this whole time. KEEP SCROLLING ↓

What it was really doing all along

You thought you bought a calculator.
While you were checking prices, asking questions, catching trains —
it was keeping your story.

MY TRIP counts your days — Day 3 / 30 — and quietly logs where you've been and what you've spent, without you lifting a finger. Each day asks for just two more things: a stamp for how it felt, and a few words you'll want back someday. The midnight ramen in Shinjuku. The temple where you forgot to breathe.

Thirty seconds a night. That's all it asks while you're busy falling in love with Japan. But it keeps every one of those moments — because it knows something you don't. Yet.

30 DAYS. THEN, SOMETHING HAPPENS.

線香花火
SENKŌ HANABI — THE SPARKLER

A Japanese sparkler burns for forty-five seconds.
Everyone goes silent and watches until the last spark falls.
That is the whole point of it.

A trip of thirty days is a senkō hanabi. It burns brief and bright, and it will end — that is what makes it beautiful. So on your last day in Japan, MY TRIP shows you one final button: Your Japan Story. Tap it, and AI reads back through everything you kept — every stamp, every note, Mt. Fuji through a train window for one perfect second — and writes your thirty days into a single story. A farewell letter from your own journey.

Then, like the sparkler, it goes quiet. The trip is over. The app has done what it came to do.

Brief. Brilliant. Never forgotten.
The story is yours to keep.

Made in Japan

Every day at Tokyo Station, travelers
from around the world stand frozen at the ticket gates.

Bags in one hand, phone in the other. Not sure which train. Not sure which card. And just beyond that gate, all of Japan is waiting — the food, the silence of temples, the beautiful chaos of Shibuya, the perfect precision of everything.

We built JapanCalc so nothing gets in the way. Not a sign, not directions — something you carry through every moment of the journey. No subscription, no account, no ads. Offered in the spirit of omotenashi: wholehearted hospitality, no strings attached.

We hope you fall in love with this country. We hope you come back.

Made in Japan. Made for you.日本より、心を込めて。

One ticket. One journey.

$4.99. Once. That's the whole pricing page.

No subscription. No tiers. No "premium". A ticket, like the ones at the station.

JapanCalc 乗車券 · ONE-WAY TO JAPAN
$4.99ONCE · YOURS FOREVER
VALID: YOUR ENTIRE TRIP, AND THE MEMORY AFTER
  • PRICE — ¥ conversion with Shopping 10% / Take-out 8%, works offline
  • ASK — AI answers about Japan, wherever you're standing
  • Route Finder — AI route between any two stations
  • 🆘 Trouble? — instant help when the ticket gate says no
  • IC Card & Transfer guides
  • MY TRIP — Day X / 30, a stamp and a note each day
  • Your Japan Story — 30 days, written into one story
Get JapanCalc — $4.99

Less than one onigiri-and-coffee stop at a convenience store.

We could have made it a subscription. We chose not to.
A journey should have a beginning and an end. So should the price.

WELCOME TO JAPAN

The ramen is already simmering. The temples are already quiet. The 9:24 train will be there at 9:24. Everything you need for the journey ahead is right here, in your pocket.

$4.99. Once. Forever.
Japan is waiting for you.

Get JapanCalc — $4.99
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