Takatsugawa River Beer is based in the Takatsu River area of Masuda City, Shimane. According to the brewery's website, it began making craft beer with local ingredients after launching the business in 2020. The Instagram post was tied to its booth at ISETAN CRAFT BEER BAR on the B1 floor of Isetan Shinjuku.

In the post, the brewery thanked visitors for the strong turnout on day one and said its melon beer was still flowing. It encouraged people to come early if they wanted to try it, and mentioned Hai-aru Natsumikan Saison as a possible next beer once the melon beer runs out. The message points to a department-store event built around seasonal beers served on site.

The photo shows the ISETAN CRAFT BEER BAR sign, which anchors the setting clearly. Like its taproom, Craft Sakaba Takatsuno, and other event appearances, the brewery continues to bring its beers directly to drinkers while keeping its Shimane roots front and center.