I am using kanji koohii to brush up the kanji I study with the Heisig books, but for some reasons the font I see on the flashcard is somewhat strange.
For example, the character for "outside" (外) appears with the last stroke crossing the fourth one.

In my system I have different fonts for Japanese (mostly from this page), I am not sure why the browser decides to use that one.

So it would be possible to change the default font of the flashcard?

What system / browser are you using ?

The font used is Noto Sans it seems...

System / broweser: Archlinux / Chromium 48.0.2564.97.
What has this to do with anything anyway?

Changing fonts in review cards has been a request for many years. There was upon a time a Greasemonkey script to do that, but it didn't last much long afaik.

I second the motion for creating a setting to choose from any font installed in the computer/smartphone, or at least give a kyoukasho style option.

I don't understand why there isn't a Japanese font set for the forum, too. I see Chinese characters everywhere because of this. It should not be difficult to include some Japanese fonts in the font-family tag...

For chromium (and chome I suppose) I found a solution. The extension stylebot allows to apply css on the fly.

So I simply added this lines

for the main site:
span.cj-k {
font-family: "EPSON 教科書体Ｍ";
}

for the forum:
div.post_body {
font-family: "Liberation Sans",
"EPSON 太角ゴシック体Ｂ";
}


And now I see nice fonts The fonts come from the page linked in the first post, but you can use your favorite starting from this lines.

Edit: changed the flashcard font from kaisho to kyokaisho.

Thanks for the tip! Works really well

Too bad I have no idea how to do the same for my phone...

Edit: I actually managed to copy the fonts to my phone just to discover that Chrome for Android does not support extensions. Sigh

Edit(2): Firefox for Android can use the Stylish add-on, but I did not find a way to add my own .css file with ease. The only option is "install from URL," but even using a url like file : // /Documents / kanji_koohii.css have no apparent effect.

It might be interesting to use this font too, as it shows the stroke order.