Right on schedule the path across the pole from Europe to Japan has opened up on 6m again this late spring, at least for well equipped high powered 6m operators. The distances are amazing (around 10,000kms) yet this path opens up most (every?) year at this time. Whether or not this is really multi-hop Es is very debatable. Once again it proves there is still much we do not understand about HF/VHF propagation. Amateur radio is continuing to add to scientific knowledge.
Now, wouldn't I like to work JA on 6m with my vertical and a few watts!