How many Japans fit in Canada?

25 Japans fit in Canada.

Really
25
As Mercator draws it
80

Mercator makes it look like 80. The map inflates the ruler and the container both, and the ruler more.

Why the two differ

Mercator draws Japan 1.61 times its true area and Canada 5.21 times. The count is the ratio of the two, so what moves it is not the inflation itself but the ratio between the two inflations. Whichever sits closer to a pole is blown up more.

Ruler
Japan 404,385 km²
Container
Canada 9,986,087 km²

On an equal-area projection

Under Equal Earth or Gall-Peters the two figures are identical - for every pair on this site. An equal-area projection draws in proportion to true area, so the count you can see is the count there is. That is a definition, not a coincidence.

Open on Equal Earth