I have been hunting for a place to get some good sashimi in Milwaukee for years since returning from the West coast, and had given up until, finally, my wife suggested we stop in to Sushi Yuki. I am not exaggerating when I say this is the best fish outside of California to the very best of my knowledge. It was bar none the most wonderful experience we've had anywhere in the city I've loved for years, from the service (shoutout to Sae!) to the atmosphere (the other guests were delightful and the patio was beautiful). The food was simply sublime (I recommend the ikura and the salmon cheek especially, that ikura was divine). You absolutely must come here—I know I will be returning, and soon.
I ought to note that I have celiac disease, and they handled it completely without issue, and the menu is both clearly marked and accurate for gluten-free options.