Is there disabled parking near the Japanese friendship Gardens?

Yes

Yes. Right behind the Spreckels Organ Pavilion is a parking lot closes to Japanese Friendship Garden

Nearby, but not really close.

You will need a wheelchair. It is a long block and a half, with a slight grade or flight of stairs to get to the garden. That is assuming you can find a parking space behind the organ pavilion.

How far is it from the garden itself?? My aunt can't walk very far but would love to go

Does the tram pick up from that parking lot?