Quick Changeable Slope
by Shunya Susuki 
This is the temporary slope that can be set up in the small room.
This slope is about 1/6.
This is usually used as stairs, but this is changed to the slope when a wheelchair user comes here.
I invented this device in 1998 so that a wheelchair user could enter the Parent & Child Room in the Hakataza Theater.
The name is "Quick Changeable Slope".
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