Same thing happens with Renault keys, which we found out once with a Captur. I dropped the wife off in town and then went to find a parking space... only to find out she had the key.
The other thing I have noticed id with the Renault key, when you walked away the car would lock itself whereas the Jazz you have to manually lock it.
Also, and something I do miss is the anti-raid locking sytsem that Renault had i.e. once you hit 5mph the doors would lock themselves, thus foiling car jackers... which I assume isn't a big concern in Japan.