Why can't I get on JR train with my electric cart?

I can get on the local train (Seibu line) with my cart.
Using an elevator, I enter to a station and get on the train using the board between the train and the platform by station worker.
That is so smooth and easily.
I don't get on the train in the rush.

As for JR(Japan Railway), electric wheel chair is OK.
And electric cart provided by the law of welfare for the handicapped is OK.
But the cart let by nursing care insurance system like me is not allowded.

Firstly I asked the reason to JR (East Japan.)
After several days, they answered that they only followed the line of Land, Infrastructure and Transportation Ministry.
Then I called that Ministry.
The goverment official said they aimed the barrier-free transportation.
Now was on the way. Electric cart of 2003 was big and not suitable for mass transit.
So they speeded up the development the smaller cart suitable for mass transit, at the same time they were allowing the cart which is necessary for the physically challenged.
Only one can't controle but electric cart.

The official may think the object of nursing care insurance are almost elderly,they may use the cart as it is convenient.

The Parkinson's disease patients over age of 40 are subjected to nursing care insurance system.
to be continued...