As of Edge stable 83 (Windows 10 x64, 1909) , on some sites Japanese is displayed, but some of the kanji/Chinese characters are not being displayed with cleartype/antialiasing.
This is not the behavior in Chrome and Brave, both which are based on Chromium.
I've attached a screenshot to demonstrate the issue. Notice that the characters in the screenshot from Brave all look uniform and have antialiasing. Some of the Chinese characters on the Edge site stand out and look like bitmap fonts.
Any help on this matter would be greatly appreciated.