A CID font (Character Identifier font) is not a single downloadable font but a technical format used in PDF files to support large character sets, such as Asian languages or complex symbols.
F1, F2, F3...: These labels often refer to different weights or styles (e.g., Bold, Italic) of the same missing font.
- For F1/F5 (Mincho/Serif): Noto Serif CJK JP, Source Han Serif (Google/Onyx)
- For F2/F4/F7 (Gothic/Sans-serif): Noto Sans CJK JP, Source Han Sans, M+ Fonts
- For F3/F6 (Specialty or Light styles): Zen Maru Gothic, Yusei Magic, Klee One
Security Risk: Sites offering "CIDFont F1-F7" for download are often fraudulent. Since no official font exists by that name, these downloads may contain malware or adware.
| Font Label | Adobe-Japan1 CID Style | Typical Family Role | Common File Name Example |
|------------|------------------------|---------------------|--------------------------|
| F1 | Ryumin-Light | Serif (Mincho) | Ryumin-Light.otf |
| F2 | GothicBBB-Medium | Sans-serif (Gothic) | GothicBBB-Medium.otf |
| F3 | Jun101-Light | Bold Serif | Jun101-Light.otf |
| F4 | GothicBBB-Bold | Bold Sans-serif | GothicBBB-Bold.otf |
| F5 | Ryumin-Bold | Heavy Serif | Ryumin-Bold.otf |
| F6 | Churyo-Gothic | Medium Sans-serif | Churyo-Gothic.otf |
| F7 | Midashi-Gothic | Heading Sans-serif | Midashi-Gothic.otf |
mutool show document.pdf object 5 # Look for /BaseFont or /FontDescriptor