Thank you for the information. I already called them, but they can't speak english. Do you have other places that I can ask ? Please kindly advise. Thank you.
As I konw, in Hakoneyumoto, there is a Japanese style cafe and you can learn how to make taiyaki. That name of cafe is Ohanamichaya. You can find tv program report here http://twit-e.com/archives/9238691.html
+ the cafe contant is https://www.google.co.jp/amp/s/s.tabelog.com/kanagawa/A1410/A141001/14041420/top_amp/
I advice you to check the availability and the opening hour in advance.