As a guest relations POV, many of our serviced apartment guests are much of health conscious and here are recommended good grocery shopping and eatery for visitor use especially in Shibuya area!
In case if you are staying or have an opportunity to do some exercise in Shibuya during weekend daytime, why don't you drop by at Aoyama Farmar's Market for good organic lunch or organic produce shopping? There is some events such as Yoga lessons or Sake tastings are often held too.
Enjoy your healthy life style in Tokyo and have a wonderful week!
Space Design Inc