K does not belong together with C and J in this case. If you are subsetting fonts to include the actually-used glyphs, the font file size for a typical Korean-language site will be considerably smaller than for a typical Chinese-language or Japanese-language site. That is, the active set of glyphs for Korean is much smaller even if the fonts you’d start the subsetting process from were about as large.
Self-hosting a Japanese font for one line of text is completely doable. I self-host all fonts for my site, which has a handful of CJK characters (across 4 fonts: Korean, Japanese, Traditional Chinese, and Simplified Chinese).
Self-hosting a Japanese font for one line of text is completely doable. I self-host all fonts for my site, which has a handful of CJK characters (across 4 fonts: Korean, Japanese, Traditional Chinese, and Simplified Chinese).