There is an article on Nikkei Trendy about the new nikuman (manju) lineup being introduced by Circle K Sunkus in August.
I find this very interesting because it was not long ago that nikuman was a seasonal food, only sold in convenience stores during the winter months. This was very noticeable, because each convenience store had to clear out table space for the large nikuman heating machines. Now nikuman, and sometimes oden, have become year-round offerings in convenience stores.
I love nikuman and welcome the availability, but also feel that something Japanese is being lost by not following the seasons. It seems very American to insist on exactly what foods you want regardless of season.