At Harumi Beer Brewery in Harumi, Chuo City, Tokyo, the new tap beer being served is "koko Ruby Berry Sour Ale." In an Instagram post, it is introduced as a beer from koko Brew TOKYO, in the Fruits Rouge style, with an ABV of 3%.

According to the post, the defining flavor is "refreshing berry tartness." It has a low-alcohol, highly drinkable finish and is positioned as a seasonal offering. Centered on tartness and fruitiness, it is a beer that works well not only when you want to start lightly like an aperitif, but also as a beer to slip in between dishes.

Harumi Beer Brewery is a venue that offers craft beer brewed on site and its own directly imported wines. On its official website, the space is described as one where guests can look out over the brewing equipment and enjoy everything from a casual drink to a full meal. Given the character of the place, a fruit sour beer like this one seems likely to play a role not only as one of the staples, but also as something to enjoy for seasonal variation.

For people who like berry tartness, of course, but also for those looking for aroma and drinkability while keeping the alcohol content low, this is a beer that fits the bill. If you're drinking craft beer in Harumi, this is one you'll want to check first among the current tap lineup.