This specially formulated soy sauce bottle is to be used particularly on desserts including ice cream and snow cones. While some people in the west prefer to put ketchup or hot sauce on everything, perhaps in the east it's soy sauce.
While some have taken to creating soy sauce-flavored desserts, this is a slightly different approach. The soy sauce bottle is available for purchase from the Japan Trend Shop. In addition to soft serve ice cream, as pictured, the condiment is also intended for shaved ice desserts. This is otherwise known as kakigori.
The product was crafted by veteran soy sauce maker Gotu Shoyu, meaning it is high quality and not just a cheap gimmick either.