RopeMarks
From wipipedia.org

RopeMarks is a Dutch organisation based in Amsterdam. The organisation has its focus on artistic bondage, specialising in Japanese bondage, a.k.a Shibari or Kinbaku.
RopeMarks was launched by lifestyle couple Bob and Chantal in Amsterdam in 1999. Together they have started the photography, demonstrations and study activities that RopeMarks is expanding upon.