“Happy train” runs on the Nankai Electric Railway Kada Line.
The names are said to be “Sachi”, “Kai”, and “Nana”.
The interior is so cute, so it’s worth to the ride.
If you like single-track, laid-back local lines, I’m sure you’ll have fun!
By the way, you can hardly see the sea from the car window.  lol

http://www.nankai.co.jp/kada/medetai.html