Living locally I visit devadeva fairly regularly. I am a big fan of their Yogi Burgers (although perhaps not so much the bun) and like that you can choose between potato wedges and salad (or have both) to accompany it. They overhauled their menu in 2012 and several of the different burger options unfortunately vanished but this has pushed me to explore more of their other offerings!
Although slightly pricy at 1600 yen the Deli plate is a good option if you're not in the mood for a burger - you get 2 different dishes that change daily, salad, soup and a variety of breads that will be replenished upon request.
They have a good range of veg/vegan cakes and tarts etc that change regularly, and also offer a small selection of organic/vegetarian cooking supplies and snacks.
If you are in the area (the Ghibli museum is a 20-minute walk away) definitely drop in for lunch!Pros: Delicious burgers, Friendly staff
Cons: A bit out the way, Slightly expensive if you add drinks/desserts