When I headed to Osaka a few months ago, my friend Nick Coldicott, who lives in Tokyo, urged me to visit what he contends is the best bourbon bar in the world: Rogin’s Tavern. Knowing Nick’s command of the spirits universe, I take a commuter train out to Moriguchi, an obscure little town about half an hour from the center of Osaka. When I emerge from the station I can see a neon light spelling “Rogin’s” in English. Inside it is dim, with a long wooden bar backed by hundreds of bottles. American jazz comes from an ancient-looking jukebox in the rear.

Nearly every bottle is bourbon, though there is a smattering of rye and sour mash. I can see bottles from the 1800s next to obscure export bottlings of Jim Beam next to standard-issue Jack Daniel’s. Seiichiro Tatsumi, an older »