He materializes in his office, in his nice little house in the old hacker neighborhood just off the Street. It is all quite Nipponese: tatami mats cover the floor. His desk is a great, ruddy slab of rough-sawn mahogany. Silvery cloud-light filters through ricepaper walls. A panel in front of him slides open to reveal a garden, complete with babbling brook and steelhead trout jumping out from time to time to grab flies. Technically speaking, the pond should be full of carp, but Hiro is American enough to think of carp as inedible dinosaurs that sit on the bottom and eat sewage.