How to ignore newly installed font unless specifically asked for?

I've installed a Japanese font ([this one](https://opentype.jp/kouzansousho.htm) , if it makes any difference) that I wanted to use to practice reading cursive writing - i.e. it's deliberately very hard to read. However, it now appears to be my default for Japanese text in Chrome - e.g. on [this website](https://www3.nhk.or.jp/news/easy/) . This is extra surprising as I have another font ([this one](https://www.nihilist.org.uk/) for practising stroke order) that doesn't get used, aside from when I specifically name it - which is by having it in some custom CSS on an SRS site. Emacs is also using neither of them as the default, for what it's worth - and the font does have characters from the Latin alphabet but the font for those hasn't changed, so maybe this is a language thing. How do I tell Chrome not to use this font in preference to others? I'm on a fresh Fedora 41 system.