It's funny how the whole "we've always done it this way" Japanese mindset goes out the window with food. (and replaced with the the palate of a child...using ketchup to replace tomato sauce and shit like that)
This reminds me of when I visited back in February. The hotel had a flyer for Dominos in my room in English, but I wasn't sure if they'd be able to understand a mix of English and my tiny amount of Japanese. It's a pity, because while those in the west joke about whether Pinapple belongs on Pizza, I was going to be brave and try one with mayonnaise and peas.