mmmmm Japanese, I love Japanese and have loved it well before I started to enjoy sushi.

And now, I adore sushi. LOL I just had to find what I liked and start slow and easy, there is a lot of sushi that is cooked, if it isn't it will tell you, there is also a lot of sushi that is vegetable or chicken instead of fish. Just so you are aware.

CA rolls are one of my favorites, it is made with crab (no roe around here unless you add it and I love roe too lol) so it does have seafood, even the imitation is seafood. There will be good teriyaki on the menu though and if you're worried about the sauces just ask for them on the side. Chicken Katsu is really good, breaded and fried and served with a good sauce, around here you can get all the sauces on the side without question. I do that sometimes because I try to cut back on the sauces because they can be high in sodium and calories. lol I've been known to ask for Chicken Katsu and get teriyaki and Katsu sauce on the side.

The soup is generally a Miso Soup around here, has some tofu and green onions in it and I love it, there will also be appetizers, egg rolls or spring rolls, pot stickers, and salads, you'll find plenty of choices. Our Japanese restaurants don't put forks on the table but I've never had a problem asking for one, I have never really been able to master chop sticks, my BFF is Japanese (born in Japan and immigrated when she was a baby) and she teases me all the time. lol She's constantly telling me that she's going to wrap a rubber band around a pair and make me practice until I figure it out. lol You'll enjoy your meal, I have no doubt.
I really like both of those dresses, both are just really pretty!

I'd go with the blue one with a sweater as well and yes, if there was snow and ice I'd be sporting either boots or flats. LOL I think you have chosen well.
Just relax and be yourself, don't stress over your outfit or how to act, he's asked you out so he already likes you. I think you're good to go!

Have fun, that's what counts.