Union is a neighborhood restaurant uniting Japanese culinary tradition with a distinctly American persona. Super-Charged With Fun, Union Unites Japanese Dining in Chicago with a Playful American Approach. Union Sushi + Barbeque Bar is among the very best of Chicago Japanese Restaurants. Combining the tempered art of Japanese dining with a fresh, colorful and urban vibe, Union ups the ante on Japanese dining with its high-energy beat and spirited food and cocktails from our super-fun Asian Bar.