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Awesome!  I wasn't clear on whether they were keeping the fonts as PDF or converting to HTML, so I made an assumption and dove right in. "Low quality letters" is a tough thing to define.  From a technical standpoint, all fonts are vector-based so they will reproduce well at any size and not be pixelated or anything, especially in PDF.  So that aspect of "quality" shouldn't concern you.  But the style of a font may make it more / less readable or appropriate. Like English text, Japanese text can be styled in different ways while keeping the same meaning.  Some may be more artistic, some more technical looking, etc.  For example: http://www.adobe.com/cfusion/type/search.cfm?loc=EN&term=kozuka&store=OLS-US&category_type=Package&go=Go To really get an idea of which font is appropriate for your situation, you may need to find someone who reads Japanese and Mandarin to help you make a subjective decision.  You won't want to use a heavily decorated font if you're dealing with a technical specification document, for instance. Honestly, try posting an ad on Craigslist and someone will probably help for free or a very small fee.  Or inquire by email at your local Japanese Society or something similar. I would use that as a guide in choosing the right font, as well as price perhaps.  I'm sure you'd be able to find some free fonts that meet your needs instead of paying. Unfortunately I can't install any of the fonts from the web page you provided, so I'm not able to say if there are any other technical reasons why they may or may not work.  Again, someone who can read the languages would be able to tell you if any symbols are missing from the font file, for instance, just like how some English fonts may not have accented characters, or mathematical characters, etc.  If you purchase a font from a reputable source they often show you the exact character map that you'll get. I hope this was more helpful this time!