All tools

The full collection. New calculators are added regularly—if there's one you wish existed, drop us a line.

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

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

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

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

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

Daily costs by city and travel style, in your currency.

Find your animal of the twelve earthly branches.

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

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