I have had luck with Natori bras in 38H recently, but this one did not fit right. The cups were at least a size too small on me, and my breasts were popping out of the top a lot. This might partially be due to an extra support band of material inside the cup, which pushed everything to the center. The center gore also bowed out away from my body moreso than it normally does on even bras that have too small of a cup. The underwire also rubs in my underarms, and this would be a problem if I wore it very long. I bought 2 colors of this style on a closeout sale online (mistake), so I couldn't return them. Fortunately my mom wears 38DDD (though I suspect she is more of a 38F-40E) and this fit her perfectly in the cups. She often has the underarm underwire problem too, and it has not been an issue for her with either one.
I reviewed this in 30DD. This one is so laughably huge on me that I can't even review it. I'm not the one to judge it's fit. It was the first bra I bought after hearing I was actually a 30E or F. It turns out, my cups size is significantly smaller than it measures, due to deflation.
The 30DD - Natori » True Decadence Cut And Sew (734097) is not a flattering shape or style on soft, deflated breasts like mine. A smaller size may have reduced the excessive wrinkling, but would not change the inner sling that lines the bottom inch or so of each cup, which creates a very obvious crease. My estimated size here and on abrathatfits is 30DD/E.
The wide set of the straps means the part between the end of the underwire and the beginning of the strap digs into the skin under my arms and started to irritate my skin in the few minutes I wore this for the fitting.
It wasn't a problem for my full-on-bottom breasts, but the top edge of the cups would definitely dig into full-on-top breasts. The cups themselves do not have stretch, but the very edge does.