I don't think Cali Grill does 'take out' per say. I certainly don't see any on the in-room dining menu. Last September, we felt that the sushi was probably the highlight of our dinner there.
We tried to get take out from Kimonos once upon a time (when we stayed at the Swan, and they would not do it there).
I can say, the QS in Japan in Epcot has a few good selections. The miso soup is not too great, but the other selections are good. The noodle/shrimp soup is very good (Tmpura shrimp udon). The sushi is not made to order. Fresh, but not custom made. Limited selection. The teriyaki chicken is fairly good though, esp compared with the burgers next door.
Kimonos is very good, if a little pricey. During dinner hours though, it would be a fairly quick hop from MGM or WS. No take out, but the sushi bar is pretty quick.
I ate at the TS in Japan shortly before the remodel, and I didn't have sushi, so I can't comment on that. We did teppanaki side and paying for an extra sushi roll was more than I wanted to spend.
I've also had sushi at wolfgang Puck Cafe. We love the Wolfgang Puck QS on th eMarketplace side, so we thought we'd like the Cafe on the other side. We were not very impressed. Our experience was tainted by poor service. The sushi was not bad in itself, but the rest of the food was just alright. They do have stand alone sushi bar area, so maybe you can get a walk up there. I never tried though, so I don't know.