Which Japanese convenience store has the best onigiri? | コンビニおにぎり最強はどこ？

Everybody loves Japanese convenience stores and their plethora of onigiri (rice balls). But which one has the best onigiri?? Is it 7-Eleven, Family Mart, or Lawson?

Today I try 6 onigiri to determine the best onigiri flavours as well as which convenience store offers the best onigiris, while exploring Tsurumi Ryokuchi Park.

Tsurumi Ryokuchi Park (花博記念公園) is a large memorial park in northeast Osaka City. It was the site of the 1990 The International Garden and Greenery Exposition, and features a windmill, large pond, flowers that bloom in every season, and an International garden that uses soil from various parts of the world (Australia, California, Brazil, Egypt, etc).
The park was enjoyable in winter, with a Moss Exhibition, an indoor botanical garden and street food market stalls, but I would love to come back in spring to see the park in full bloom!

My filming gear: https://amzn.to/3XojX7U