Tokyo: Along the Toei Oedo metro line sits a discreet little place called Bar Gen Yamamoto. Picture a small space carved out of a 500-year-old Mizunara tree, seating only eight at a time. There is no music or gaudy bar décor, merely an ikebana flower arrangement near the door. The menu itself is limited to either a tasting of 4 or 6 cocktails and their philosophy, seems quite simple: to make really really good cocktails.