M+ fonts are generated from the M+ outline fonts TESTFLIGHT 63a retrieved from mplus-fonts.osdn.jp/mplus-outline-fonts/download/index-en.html.

The following changes were made using fontforge to produce mplus1mn-*-ascii.ttf fonts:

** Non-visible Characters (U+00a0)
** Basic Latin (U+0020–U+007e)
** Enclosed Numbers (U+2460–U+2473, U+2776–U+277f, U+24eb–U+24f4) (M+ 1mn Regular only)
** Box Drawing Symbols (U+2500–U+257f)
** .notdef glyph
** Non-visible Characters (U+00a0)
** Basic Latin (U+0020–U+007e)
** Latin-1 Supplement (U+00a0–U+00fd)
** Latin Extended-A (U+0100–U+017f)
** Greek Alphabet (U+0391–U+03c9)
** Cyrillic (U+0400–U+04ff)
** Assorted Symbols (U+20ac, U+2713–U+2714)
** Enclosed Numbers (U+2460–U+2473, U+2776–U+277f, U+24eb–U+24f4) (mplus1mn-regular only)
** Box Drawing Symbols (U+2500–U+257f)
** .notdef glyph