Bluegrass music in Japan

Here is a story from National Public Radio (November 2016), http://www.npr.org/2016/10/30/498827939/meet-the-musicians-behind-japans-vibrant-bluegrass-scene

And then there is James Stanlaw's documentary on the subject, too, from 10 years ago, and this more recent presentation:

Japanese-Bluegrass: Creativity and Nostalgia in a Borrowed Imaginary Musical Genre.". 91st Annual Meeting of the Central States Anthropological Society.. Central States Anthropological Society.. (2014)