Mora

Japanese now has such a df as "mora". This has a flag in "a", "i", "u",
"e", "o", "ka", ki", "ku", "ke", "ko" etc, and either match a hiragana or
character or romaji characters. And in the future I'll put in katakana and
possibly cyrillic characters too.

Try this out in demos/kanjify:
for i in {1..6}; do echo -n $i " "; ./kanjify -kyouiku $i watasi ga heya wo ai suru; done
It will give you the same sentence transcribed at six levels of kanji
proficiency.