What is the font used by kanji koohii for kanjis?

I'm trying to type kanjis on my computer, but some of the kanjis I type look different than how they look during my flashcard reviews on kanji koohii. What font is used by kanji koohii for rendering the the kanjis?
Edited: 2017-03-08, 4:51 am
On my computer it's Hiragino Mincho Pro, but I believe it could be another font on your computer depending on OS prefs and installed fonts.  But try Hiragino Mincho Pro and maybe it works.  I don't believe there are as many Japanese fonts as in common use so you're more likely to get lucky buy just trying the few that are installed on you computer.
font-family:"Hiragino Mincho Pro", "ヒラギノ明朝 Pro W3", "MS 明朝", "MS P明朝", serif;

Related Github issue Improve the Japanese font stack #78

What computer / OS do you use?
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Thanks yogert909 and Fabrice. I use MacOS Sierra on a MacBook Pro.