This post from Fukuoka NOW links to a good primer, with some key terminology, on Valentine’s day in Japan. One addendum I’d like to make to their chronology is that Morozoff’s is a rare example of immigrant entrepreneurship in Japan: “Morozoffs confectioner family is probably the sweetest example of Russian immigrants achieving success in Japan.”

– Kirk

https://www.rbth.com/arts/2015/05/31/the_morozoffs_a_story_of_russian_confectioners_in_japan_46495.html