Building a machine? Need steel for a welding course, table or project? Need extruded aluminum? Need gears, chains and pullys?
Teppan-Ichiba sells direct over the internet
http://shop.smartdiys.com/ sells lots of build materials in Japan, including Openbuilds V-slot extruded aluminum:
The following shops sell direct, and take internet orders<br>
Monotaro also has a wide selection of extrusion, as well as all the other parts:
These parts can be found in a few shops in Akihabara, as well as online.<br>
RS carries a good chunk of the POWERS small mechanical inventory: