I'm one of the victim of the so called Sergey the creator of MMM Japan in the year 2016 when i was still a newbie and it sad after the CEO scammed a lot of people and was said to be convicted (maybe not) his project is still listed on CMC and coingeeko with P2pb2b exchange. I will advise people not to believe what the puppets thread pumping is saying.
More information about the man Sergey Marvodi aka Mavro can be found here.