Minoru Higashiyama

Owner and bartender of the bar "Bar Higashiyama" in Ginza. Known as "Service Higashiyama" and famous in Ginza along with "Technique Kuzuhara," he creates cocktails that soothe the hearts of customers with his sharp observational skills. He teaches the difficulty and importance of providing the right service to customers by seeing through them with the help of the chief bartender, Sasakura.

In the anime, he supports Kuzuhara in explaining alcohol as a "behind-the-scenes" figure. Like Kuzuhara, he sometimes becomes a storyteller along with Miwa. His skills are showcased in the same episodes as Kuzuhara, only in episodes 7 and 11.

As mentioned later, a different person fulfills his role in the original work.