> 90% coverage is not that great ... when an uncommon word appears TFA muddles this somewhat, but the research referred to has to do with coverage of kanji cha

> 90% coverage is not that great ... when an uncommon word appears TFA muddles this somewhat, but the research referred to has to do with coverage of kanji characters in a corpus text, not words. Someone who can read 90% of the kanji in a Japanese text might understand significantly more or less than 90% of the words, depending on the text. Also notable: the research behind this was based on newspaper text corpora, which one could expect to have a lot of kanji and kanji compounds that are uncommon in casual usage.