I discovered this place, less than five minutes walk from my place, only yesterday, thanks to some information from a couple of new couchsurfing friends. It has wifi, LAN and power points, and a view out over the harbour. My new office.
They have a different lunch set (all ¥400) every day, and Friday is soup day. Many choices of soup too, including minestrone and clam chowder. Other days they have pasta, rice and curry with naan. Considering their coffee is ¥280 on its own, it's a great deal!