A growing collection

Japan,
by the numbers.

Practical calculators and articles about Japan. Verified figures, written from Kanagawa.

01壱

For travelers

Plan smarter, spend less, and skip the small confusions.

01FEATURED

Japan trip budget

Daily costs by city and travel style, in USD, EUR, GBP, AUD, MXN.

5 currencies3 styles2026 data
予算
02寸

Clothing & shoe sizes (Japan ↔ EU/US)

Convert Japanese clothing, shoe and ring sizes to EU and US.

03車

Is the JR Pass worth it?

Enter your route. We tell you if the pass beats individual tickets.

04免

Tax-free shopping (5,000 ¥ rule)

See if your purchase clears the tax-free threshold and what you save.

05干

Japanese zodiac (eto)

Find your animal of the twelve earthly branches.

06時

Japan jet lag calculator

Flight time, time difference and a practical plan to adapt to Japan time fast.

02弐

For residents

Tools for the paperwork, taxes and life-admin of living in Japan.

07FEATURED

Furusato nōzei (ふるさと納税) limit

How much you can donate this year and still get the full tax deduction.

¥2,000 net cost~10× return2026
納税
08令

Western ↔ Japanese era

Convert any year between Gregorian and Reiwa, Heisei, Showa, Taisho, Meiji.

09歳

Japanese age (kazoedoshi)

Your traditional Japanese age, used for kanreki and certain rituals.

10給

Japan net salary (gross → take-home)

Income tax, resident tax, pension, health insurance—done in one place.

11賃

Japan rent cost (move-in + total)

Reikin, shikikin, agency fees, kōshinryō—the real cost of renting in Japan.

12定

Monthly commuter pass — worth it?

Compare IC tickets vs monthly pass for Tokyo and Yokohama routes. 2026 fares.

03参

Recent articles

Plain-language pieces about life and travel in Japan, written from experience.