Two popular veterans of Angel’s Share, Shigefumi Kabashima and Tetsuo Hasegawa, have taken their skills uptown to Hamilton Heights. The name descriptively stands for ramen, oysters, kitchen, and cocktails. That’s serious — and beautiful — cocktails, like a drink with passion-fruit rum, pineapple, and vanilla that’s presented in a dimpled vessel fit for a tiki bar, topped with an umbrella and half-lime that’s torched to caramelize its sugars. Another cocktail, fittingly called Smoke (bourbon, ancho chile, Cynar, and bitters), gets hot-boxed in a cloche, admittedly a technique also used at Angel’s Share. There are twists on classics like a Thai tea spiked with absinthe and cachaça, and a matcha latte fortified with Japanese whiskey, like the Japanese answer to Irish coffee.