(Apologies if this has already been posted, but a search showed nothing …)
Snow Peak have introduced a line of sleeping bags in Japan, with 3 models:
http://www.snowpeak.co.jp/newproducts/bacoo/


– 90/10 800 FP down
– 20 denier fabrics
weights are 670 grams/830 grams/1120 grams, ratings for the three bags are +6C for the lightest one, 1C for the middle and -7C for the heaviest
the black fabric on the side and bottom of the bags is water resistant and the grey fabric on top is stated to be very breathable.
without doing a fill-weight comparison, they appear to be heavier than WM but they do have a few more features (pockets) which may add weight

