Links to pdf files (mainly in Japanese, but the photos may be of interest even to those who can’t read Japanese).
Report on the 2013 work camp:
http://ataraxia.jp/d-kyushu/kakehashi/pdf/phi19a.pdf
Report on the 2014 work camp:
http://ataraxia.jp/d-kyushu/kakehashi/pdf/phi20a.pdf
The files above are the two most recent of a series of pdf reports in Japanese (19 and 20 0n the list shown on the following page):
http://ataraxia.jp/d-kyushu/kakehashi/
