man umbalata podi seen ekak kiyannam japane athule japan eun wadiyenma padina wahana monada kiyala methanin samaharak ewa lankawe eun padinne natthe ai kiyala man danne
wagon R - Four-seater
sienta Seven-seater hibrid/noramal
X-trail - Five-seater
BOx
Tanto
Tank
prius - Five-seater - hibrid(2010 passe ewa godak thiyanawa)
daihatsu wahanath godak thiyanawa
nissan note
voxy
honda freed -Seven-seater/ Five-seater
godak welawata mee wahana pare dakinna thiyanawa
udin man daala thiyana wahana walin sienta/honda freedkiyana wahana sahena honda wahana wadiya lokuth naa 7k yannath puluwan lankawe wadiya dakinna naa ai kiyala man danne naa
thawa wargawala wahana nathuwa nemi ambanekata thiyanawa eeth mee wahana parawal wala wadiyen dakinna thiyanawa

I don't live in Japan but been there twice, travelling to many places. I noticed exactly the same as you said. In any case the smaller cars are more because of their garaging and parking limitations.
I rented a mini bus on my second visit as we had 10 in the group (plus baggage). When I booked it on-line, they sent me and email requesting for a copy of my license to confirm that I do possess a valid bus license. When I went to collect I had no problems as the details has been entered into their system. They spend more than an hour and a half programming the navigator (as it was in Japanese, Bilingual or English navigators are only in cars) for me for the hotels where I stayed during the stay. It's a beautiful country.
The main problem in srilankan roads is no matter what size the car is - you drive it without letting the others pass, hogging the entire road and driving at the speed of a horse cart. It's the new generation of drivers I believe who does this. I always do zig-zag and pass them.
PS: The new 2020 RAV4 has a long waiting list in many countries. It's that popular.