Don't worry, I'm not asking how to replace an inner tube or tire. That I can do on my own. I was biking to work this morning, and less than 1km from work I let my guard down and ran over something hard and metallic (probably an empty can), resulting in a big clunk and a hissing sound. My tire was completely flat within a minute. Closer inspection revealed a nice big gouge in the tire as well. I walked my bike the rest of the way and parked it. What I want to know is, does anyone know of any good bike shops near Hamamatsucho? Or, lacking a new tire and tube, any tips for bringing my bike home (aside from walking 7-8km)? I often hear people say to just pop it into a garbage bag; where can these mythical large black garbage bags be found? Thanks in advance.