http://edition.cnn.com/2016/07/07/foodanddrink/wanko-soba-challenge-japan/index.html
11 years ago, I participated in wanko soba challenge on a school trip. But, due to a number of participants, it took a long time to fill a mouthfull of buckwheat after emptying my bowl.
So, I couldn't feel as if I was challenging it.
