I see it, or variations of it in a lot of the Japanese films/youtubes I watch, it is a loose yet tidy style, which looks so very comfortable!
It isn't wacky like Gudrun Sjoden and rarely sports a pattern, but there seems to be emphasis on texture and natural fibres.
What i can't get my mind around is why I always look/feel weird in loose clothing myself. I am 5ft5 and slender, not much in the boob dept and have a fairly simple look that should suit these clothes.
So if a similarly sized/build of Japanese or Korean woman makes this style look lovely, where am i going wrong? 
People in the west often say oooh you have to be tall to pull it off, but this obviously isn't at all true.
I would love to include more pieces like this in my wardrobe!
Maybe I am so used to skin tight clothes such as leggings and skinny jeans over the years that my mind can't switch.
Any shop recommendations would be appreciated.