/jp/ - Otaku Culture

A few years I bought an EMOOR mattress and foldable tatami pad to sleep on, and ended up using it for about 2 years.

This was definitely inferior to a standard tatami (in your pic), but it was hyper portable and not completely terrible to sleep on. I ended replacing it with a full bed though, as the flat surface bothered the rods in my back. I imagine it would be acceptable for others.

For the one in your image, they seem to run a few hundred in the USA if you order from Japan, though you may be able to find cheaper ones from direct Chinese imports and the like.