Although they drive on the left, Japan allows left-hand drive vehicles, but stepping out into traffic can be a real bummer, hence the change in coach door entry sides. Gardner Pacific also built a number of Sunrader molded
fiberglass motorhomes on Toyota chassis for that market with entry doors on the left, but also left-hand drive.
In some right-hand drive countries, like Australia, it's very difficult to get a left-hand drive vehicle permanently imported and licensed.