This package provides upLaTeX support of japanese-otf package "otfbeta (v1.7b8 2019/04/01)" by psitau-san ( http://psitau.kitunebi.com/otf.html )
The source files of japanese-otf-uptex are maintained at this repository. See the file "japanese-otf-uptex/00otf-uptex.txt" for more details.