There was an earlier workshop in Japan.  From wiki:<p>&quot;A workshop on IUT was held at RIMS [Japan] in March 2015 and in Beijing in July 2015. A CMI workshop on IUT theory of Mochizuki was held in December 2015 in Oxford, IUT-Oxford (2015). A workshop on IUT will be held in July 2016 at RIMS.&quot;