Yes you can usually pick the quilts made by Japanese quilters. A lot of it has to do with their use of colour, but there is more to it than just colour. If you look back over centuries their aesthetic appreciation (in literature, textiles, painting, sculpture, pottery, even architecture and landscaping) has often been for very elegant (often minimalist) expression, and this often shows in their quilts. At a base level, just consider the impact of their floral arrangements, many of which have only one perfect bloom.
If you can, check out what it takes to become a registered quilt teacher in Japan. Last time I looked it was virtually a ten year apprenticeship, with extremely high standards and exams, and requiring submission of original designs and work for judging. One small perfect work is more highly prized than many "good" pieces, and this has often been interpreted by Western culture as perfectionism. To some extent this is true, but there are possibly some more mundane reasons underlying this. If space and resources are limited you tend to aim for one perfect example.
A few modern anthropologists have theorized that this is part of the reason for Japanese tourists taking so many digital pictures when travelling. Few if any of the images will ever be printed, but they take no space. Possibly one image in a thousand will be selected, printed, and carefully and thoughtfully displayed in a modern home.
Others have concluded that the modern striving for perfection is a reaction to the post war industrialisation of Japan when so much was mass produced, often at the expense of quality. Or a (subconscious?) effort to remain different from the all-pervasive "Western cultrue" that seems to be enveloping the globe.
The impact of national cultures on designs is fascinating. Modern Japanese quilters also make the most amazing fluorescent coloured quilts with massive embellished 3D ornaments, although I think the underlying sense of style is still there. So where does the impulse to use such colours come from?
OMG - that all sounds so prosy LOL. That's what you get for reading anthropology!! I will go back to my stitching.
BTW - welcome to the fourth fur baby