Thanks for sharing the announcement and the effort to translate the questions and request from Fortran users. There are quite a few nuggets of wisdom in there. I look forward to the feedback from the Japanese community about the fortran-lang.org projects.
Judging by projects such as the Omni compiler for XMP there is a lot of interest in Fortran at a professional level.
Also projects like the uzura3 mp3 encoder (also using fpm) from, and the blog from the same author, are very impressive.
Speaking of data formats, you could add toml-f to your tutorial.