On Oumi Beer's official website, "Japan Nationwide Specialty Products Exhibition 2025-11-21,22,23" was posted on September 10, 2025. There was no body text, but from the title and date, it clearly announces the brewery's participation in the event.

According to the official event page for "Japan Nationwide Specialty Products Exhibition," the dates are Friday, November 21 through Sunday, November 23, 2025. The venue is Ikebukuro Sunshine City Exhibition Hall A and B, the hours are 10:00 AM to 7:00 PM (closing at 6:00 PM on the final day), and admission is free. About 200 exhibitors from across Japan are expected.

Furthermore, the official exhibitor page lists the following information for Oumi Beer Co., Ltd.:

- Booth name: Oumi Beer
- Area: Prefectural Corner, Food Court
- Hall: A-2, A-3
- Featured product: Oumi Beer Koji Ale

The promotional copy describes Koji Ale as "low bitterness, aromatic and bright, with a balance of koji umami and hop aroma," making it an approachable option even for visitors who are not usually used to drinking craft beer.

Oumi Beer is a brewery based in Honkatata, Otsu City, Shiga Prefecture. According to the company's official information, it is a small brewery founded in September 2017. It handles more than a dozen bottle beers in its shop and releases a limited-batch "Beer of the Month" on the first Sunday of every month. For beer fans, it will be worth watching what lineup this maker, with the strength of small-batch, many-variety brewing, brings to a major metropolitan specialty products event.

November in Ikebukuro should be a good chance to try a taste of Shiga on site.