I modified Kobo Utilities to add the two new Rakuten fonts to the 'set font' dialog.
While it works as expected for me,
please consider this a test version until other users confirm it works and/or look over the changes (lines 67-129 of dialogs.py, plus a bump of version in line 27 of __init__.py).
Version 2.16.7 - 19 December 2022
- Change: Add new fonts 'Rakuten Sans' and 'Rakuten Serif' to font settings dialog. (change made by ownedbycats.)