So I splurged the other day and bought a
Gyokucho 250mm Folding Razor Saw w/812 blade. As Japanese saws go, this is a thick, rough cut blade (1.13mm kerf, 2.5mm pitch). I wanted a folding saw because the traditional style Japanese saws are too big and I am NOT doing "fine" carpentry. Just odds and ends of wood, plastic, heavy non-corrugated cardboard, etc.
That suckers is AMAZING ! A few cuts on some 1x3 and 2x4 and it goes through them like the proverbial "hot knife through butter" ! I was very concerned about the "cut on the pull", but just let the saw do the work
(don't force it, no added pressure) and you'll do fine !
For general purpose, save yourself a few bucks and get the 200mm blade with the thickest blade you can find. They do sell replacement blades.