master of sake; sake advisor
A professional title for someone with deep knowledge of sake, often involved in tasting, selection, and advising. Related to 酒匠.
See also: 酒匠
He holds a qualification as a master of sake.
It's an event where you can taste sake selected by a sake advisor.
From 利き酒, also written 利酒, “sake tasting,” and 師 “specialist,” denoting a specialist in evaluating and advising on sake.