This is a beautiful, big lake near Aizuwakamatsu.
We didn't spend so long here, but its obviously a good place to have a relaxing time away from it all. I think we'll be back.
There are nice quiet camp grounds (even on the public holiday). There are sandy beaches that look good for swimming. There is a boating area where a lot of powerboats and jetskis are available.
There is also a migratory bird sanctuary which is visited by white swans in winter, but there were no birds there in September when we visited.