You would need high octane for turbo 660cc as fuel quality would be an issue. I would suggest going for any non turbo variant if you consider jdm, especially if you don't plan on hauling a lot of stuff.
However don't limit yourself to just jdm and consider the possiblity of a Suzuki alto, Cultus or Kia Picanto. These are very good options and would be better value for money IMO as you will be spending slightly more for a new vehicle.
Rest is your choice.