Here is the full bibliography of most of the works cited in the notes (a select bibliography of works in English is in the book):
Mehl Violin Japan Biblio Full website MACRONS
Here is the promised list with biographical information about foreign violinists who performed in Japan (and in some cases settled there) between the World Wars.
Mehl NBLA Appendix Visiting Violinists WEBSITE
In many cases information was hard to find and I would be grateful for any additional hints from readers.