If you look closely, Kana appears a little thicker than Kanji and Latin characters. Hangeul also appears thicker just like the Kana.
It seems to affect Dolphin and Strawberry. But I noticed that the Firefox file picker is fine:

Actually, Firefox itself is completely fine and I’m pretty sure it just uses Noto fonts as well. Fonts on Discord are also okay.
One thing I did notice is that “Noto Sans CJK” (JP/KR/SC/TC/etc) DOES appear thicker in the Font System Settings of KDE. This is what “Noto Sans Regular” looks like:

And this is what “Noto Sans CJK” looks like:

Notice that both “Regular” text do not appear to be the same. The CJK one is thicker.
Right now, a work-around is to set my main font as “Noto Sans CJK” but set it to “Light” instead of “Regular” and it looks pretty good:

But the Monospace Noto Sans CJK is thick as well with no option to make it lighter. Not as much of an issue as the graphical apps though:

This is a fresh install of Fedora 43 KDE btw. Hope someone can help me out here before I nuke this install for Bazzite, CachyOS, or something else lol


CJK HK is the Chinese font. Select CJK JP instead.
That screenshot was just an example but regardless of whether I set my main font as JP/KR/HK/SC/TC etc, the font appears thicker in its “Regular” style unlike non-CJK Noto Sans.
Still haven’t found a way to fix it but setting Noto Sans CJK Light as my main font is good enough (see the last picture of my post).
edit: what my config looks like right now:
Kana and Hangeul look okay with this.