In Japan, Baskin-Robbins is popular.
It has been popular in Japan for at least as long as I’ve lived in Japan (which is since 1990).
Halloween, though, wasn’t very well-known or popular in Japan when I first came here…but it has become increasingly popular over the years.
Japanese children don’t knock on their neighbors’ doors asking for “Trick ‘R Treat” candies like they do in America. But Halloween events at Tokyo Disneyland and other places are popular.
Also, in Japan nowadays, many famous brands, such as Kit-Kat, Starbucks, etc. offer special Halloween treats.
So of course, the aforementioned popular American ice-cream chain Baskin-Robbins has been offering a limited-time Halloween menu of treats every year.