One of the international events held is the International Online Riichi Mahjong Championship, or IORMC. Originally as an exchange between South Korea and Japan, it had slowly incorporated more and more countries from around the region eventually featuring 17 countries from around the world in 2016. As a point of interest we went back to look at the history of the tournament, and was able to find information as far back as 2011. Back then it was 8 v 8 with Japan's 8 actually being pros in real life.
For those curious, we've collected the results from KML's (Korea Mahjong League) archives and put them all in one place here: