I went to Eastern Hokkaido from 3rd to 7th in September. In this trip, I could see Hazel Grouses, Red-crested Cranes, Crested Kingfisher, White-tailed Sea Eagles, and so on. I also enjoyed a pair voice of Blakiston's Fish Owl. These were my target on this trip.
Bean geese have already arrived in Hokkaido. Probably they will come soon to Honshu, the main island of Japan, I suppose.