I have a keyless remote start remote that came with the Alphard MZ G that I bought at auction in Japan. I imported it to Vancouver, Canada.
The keyless remote start, which has a pull out aerial, works flawlessly but you have to be within twenty feet. Nice for cold days.
I am doing a camper conversion on mine, it's not so easy over here. You have all the good stuff over there. I know, I've been buying lots of stuff out of the UK.
I live in mountain country here and with the all wheel drive with adjustable suspension this vehicle is pretty capable off road/ soft road.