Hi

Will you be staying in a hotel? If so, I don’t think any hotel would let you bring in a rental bed because they would need to store the other bed in the meantime etc.

These hotels have motorized beds:

• https://www.accessible-japan.com/hotels/japan/tokyo/shibuya/mid-range/hotel-sunroute-plaza-shinjuku/

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How about on the top of SkyTree?

https://restaurant.tokyo-skytree.jp/english/

Is there any food you like in particular? Also, can you remind us of the season?

Unfortunately, the observation car is at the very front but the accessible seating is in the middle of the train.