I forgot to add that one of my new applet's lets you see the correct font name in Japanese if you are using, say, the free fonts from Epson or the M+ project ( and displays that name in that very font.)
Anyone can write a Curl applet to test fonts in a few moments on most any device.
If you are comfortable writing a short script, let me know what pointers you may need.
Whether in Curl or in HTML+CSS, remember to test a font using the kind of text layout that you will face on real pages - whether that is narrow columns or long wide paragraphs ... and the contrast, colours, brightness.
Remember : a larger font (12pt+ ) will not always be more readable than a smaller font (12-14pt). Reading is about recognition and much of what we were taught in an earlier generation is now debunked/dismissed by stronger scientific evidence from more reliable experiments with better tested theory.
Turning up your screen resolution will put more text on the page ... and that would then be a new reading context ... so be sure not to be comparing apples-to-oranges ! Now, what is that idiom in Nihongo ?