Valentine's Day is coming. It's common for Japanese women to give chocolates to men. Women are encouraged to express love or gratitude to men by giving chocolates. Chocolates are often given to male co-workers, bosses, friends, family members, and so on. On the other hand, men give various gifts to women on March 14 called White Day.
This tradition started as a marketing tool for chocolate companies in Japan. There are several stories about the origin of the stories, but I think Morozoff Ltd. is the most likely origin which introduced Valentine's Day to Japan.
In 1936 the company ran an advertisement in the Japan Advertiser with the phrase, “For your Valentine, Make A Present of Morozoff’s Fancy Box Chocolates.” The Japan Advertiser a publication catering to foreigners.
Morozoff Ltd. is one of Japan’s leading confectionery makers, starting from a chocolate shop in Kobe in 1931. Especially in Kansai area, it is popular among people as the firm that provides "Custard Puddings." The puddings are famous not only the delicious taste but also the durable glass pots.
Employees say that the glass pots are indispensable to the creation of Morozoff’s Custard Puddings. By using of glass, the entire pudding is heated evenly right through to the center, maintaining that sublime soft texture. Maybe, most families in Kansai have the glass pots on their shelves for using as cups.