Sushi Ginza Onodera
Not sure this is the best chirashi in Los Angeles, but it's certainly up there. Kato's now-departed chirashi box was probably just as good and cheaper, but they can't match Sushi Ginza Onodera's completely crazy ingredients list, nor their presentation. As a Michelin 2*, Sushi Ginza Onodera clearly decided that caviar and gold flake as garnish wasn't over the top!?!?
Bafun uni (sea urchin), kegani (hairy crab, Hokkaido), kurumaebi (tiger prawn, Okinawa), buri (wild king yellowtail, Hokkaido), ikura (marinated salmon roe, Hokkaido), anago (sea eel, Nagasaki), toro and akani (bluefin tuna), ika (squid), and yes, the aforementioned cavaiar. Presentation isn't quite as exquisite as Urasawa, but it's still a delicious meal despite its ridiculous garnish, and yes, it's superb.
That said, do note it's probably best eaten sooner than I did. Sitting in rush hour traffic probably did the meal no favors, and unlike some meals where I've stopped to nom in the parking lot, it was too dark and too full of rush hour traffic, even at the northern reaches of La Cienega Blvd., to make that feel practical.