Been to Raku everytime we visit Vegas and we always bring our friends to try it out. One of my favorite go to Izakaya Restaurants that is never a let down. Prices, they're reasonable for what you get! I don't know if it's because Izakaya prices in Hawaii are so much more expensive than compared to mainland but I thought it was really inexpensive.
Anything with foie gras, order it. Anything with uni, order it.
If you come in a large group, just order a bunch of things (one order of each item) so everyone can nibble a piece :P