GRANDLINE BREWING, based in Ogawacho, Yokosuka City, is a brewery and taproom that grand opened on October 6, 2023. On its official website, it promotes the idea of making beer that connects from Yokosuka to all of Japan and even to the world, under the slogan, "Let’s raise a glass and make that best moment even better!"

This time, the announcement made on the official X account was for a taproom-only service on Saturday, April 25, 2026. The post indicated that the next business day has been set for that date, and stated that 10 beers will be available On Tap that day. It also said the first celebratory beer will be 10% off, creating an incentive to visit.

The lineup includes "Mrs. Scarlet" and "PONZ MAGIC," both of which can also be confirmed on the official website. Mrs. Scarlet is a fruit sour ale, while PONZ MAGIC is a sour ale made with ponzu, and both are distinctive beers that reflect the brewery’s playful spirit and clear sense of flavor. On the day of the limited service, the appeal will be the chance to sample a set of beers with very different personalities all at once.

GRANDLINE BREWING is also a brewery that has proposed beer not simply as a product, but as an entry point for experiences and communication. This limited service is worth noting as an opportunity to directly feel that philosophy at the Yokosuka taproom.