Mentioned by denver.org
Denver's International Restaurants | VISIT DENVER
"While Sushi Den cemented the reputation of brothers Yasu and Toshi Kizaki, this lively izakaya—located next door to Sushi Den and the second restaurant in their trifecta—only made their stronghold on Denver’s Japanese scene more concrete. Like Sushi Den, the aesthetics reach dazzling heights (especially if you’re seated on the rooftop patio), but unlike Sushi Den, where raw fish takes center stage, Izakaya Den turns out sushi, plus a parade of innovative small plates punctuated with global ingredients. Sake is the preferred beverage here, and the list is concretely comprehensive."