In an Instagram post by the Kobe, Sannomiya beer pub "Saiouguma," the guest beer being introduced is MAHOWBREW (Okinawa)'s 'Nidhogg Luchuensis'. The style is listed as Norwegian Sour Red Ale, with an alcohol content of 6.0% and an IBU of 17.

What makes this beer distinctive is its three-company collaboration involving Bygland Bryggeri (Rannei Sake) in southern Norway and Kveik Yeastery, which works with the country's traditional yeast. The post explains that Bygland Bryggeri makes sake from koji under the name "Rannei Sake," and that because Kveik yeast is used in its fermentation, the beer was designed around combining citric acid derived from koji with the acidity of Kveik yeast.

In brewing, black koji, also used in awamori, is employed at half the amount of the malt and mashed for about 18 hours. In addition, black koji saccharified separately and then deactivated is added before fermentation, and after fermentation the beer is matured with French oak chips. The finished beer is introduced as having a soft, fruity acidity with notes of plum, cherry, and earthy nuances.

Saiouguma is a beer pub located in Sannomiya, Chuo Ward, Kobe, Hyogo Prefecture. As a place where you can enjoy craft beer, it is also appealing for the guest-beer information it shares. Rather than being just a notice of arrival, this post is notable as something to savor together with the background of the brewers themselves.