A standard Japanese character set requires thousands of glyphs. A comprehensive Chinese dictionary can require over 70,000. The existing font architecture of the time simply couldn't handle that much data efficiently. Loading a font that large would crash the average Macintosh or PC of the era.
If you only need to print, view, or visually edit the document without changing the actual wording, converting the text into vector shapes strips out the font requirement entirely. cidfont f1 f2 f3 f4 f5 f6 full
You edited a text string that uses CIDFont+F2 , but your system does not have the original base font installed. The PDF viewer falls back to a different F-slot. Fix: Extract the embedded font using tools like pdftops (Xpdf suite): pdftops -fontdir ./extracted_fonts document.pdf A standard Japanese character set requires thousands of