A growing collection
Practical calculators
for life and travel in Japan.
No fluff. No sign-ups. Just the numbers you actually need—from era-year conversions to whether the JR Pass is worth buying.
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For travelers
Plan smarter, spend less, and skip the small confusions.
Clothing & shoe sizes (Japan ↔ EU/US)
Convert Japanese clothing, shoe and ring sizes to EU and US.
Open calculatorIs the JR Pass worth it?
Enter your route. We tell you if the pass beats individual tickets.
Open calculatorTax-free shopping (5,000 ¥ rule)
See if your purchase clears the tax-free threshold and what you save.
Open calculatorJapan trip budget
Daily costs by city and travel style, in your currency.
Open calculatorJapanese zodiac (eto)
Find your animal of the twelve earthly branches.
Open calculator02
For residents
Tools for the paperwork, taxes and life-admin of living in Japan.
Western ↔ Japanese era
Convert any year between Gregorian and Reiwa, Heisei, Showa, Taisho, Meiji.
Open calculatorJapanese age (kazoedoshi)
Your traditional Japanese age, used for kanreki and certain rituals.
Open calculatorJapan net salary (gross → take-home)
Income tax, resident tax, pension, health insurance—done in one place.
Furusato nōzei (ふるさと納税) limit
How much you can donate this year and still get the full tax deduction.