Well actually the Simplicity pattern isn't very accurate at all. It looks okay until you start using it or really researching. I could have saved myself some muslin if I’d realized the jacket didn’t have set-in sleeves sooner. Overall it's not been as useful as I'd hoped, I'm having to modify or ditch every element as I go along. Oh well!
It makes perfect sense though, Orientalism being so popular in the culture at that time. It's one of the things I love about this period, it's one of the more inserting Western takes on the Orient (particularly Japan) that has come along I think. It also makes sense from a film perspective, almost all of Rose's other costumes are cut with kimono sleeves.