The hiking was pretty nice. I was about to give up because of sudden rain, but it soon stopped. We walked to the lake and have some coffee there. I feel the workshops held in Japan should have such a nice hike or an excursion. Unfortunatel…

We were working on the way to draw a planar graph without crossing as "people do," not as the computers do. We obtained some observations but still more work is needed. I hope this is an interesting problem. We leave the detail for the pap…