How many uses for WD-40, let me count the ways...

Japanese equivalent: a common name/brand sold here is Kure's CRC 5-56

Eliminate scuff marks from tile floors
Remove water spots and mildew from mirrors and windows
Remove dirt marks from walls, carpets and floors
Lubricate sticky cabinets and drawers
Stop squeaks on door hinges

AND here are my personal two favorite uses for the stuff:
*Get the clink noise out of my bicycle chain.
*Get the paper cutter on the fax machine to slide back and forth properly.

To help you buy one, here is a picture of a CRC 5-56 can at:

http://www.tokyowithkids.com/graphics/fyi/cleaning/crc5-56.jpg