Japanese Rail Sim 3D: Monorail Trip to Okinawa (known in Japan as Tetsudou Nippon! Rosen Tabi: Yui Rail-hen, which loosely translates to "Railway Japan! Every Route: Yui Rail Edition") is a train driving simulation game developed and published by Sonic Powered for the Nintendo 3DS in Japan on August 27, 2015 (as a retail release) and in North America on August 25, 2016 (as a downloadable title).
The fifth installment in the Japanese Rail Sim 3D series (after 5 Types of Trains), Monorail Trip to Okinawa follows the Okinawa Urban Monorail line (better known as the Yui Rail line) in the tropical Japanese city of Naha (from Naha Airport to Shuri). Unlike previous games in the series, this installment has players controlling a monorail train, with simplistic one-lever controls. Also, similar to Journey to Kyoto, this installment features a bonus "Night Mode" for night-time driving.
It was later bundled with the sequel in Japan as Tetsudou Nippon! Rosen Tabi: Jouge-sen Shuuroku Double Pack.