Some special trains adopt cars (Series 155) used for school trips, which are unused during the summer and winter seasons, and the cars of Miyahara Ward have received seismic reinforcement and hardy construction during the season.
臨時列車では夏冬に運用がない修学旅行用車（155系）を利用したものもあり、宮原区の車はこの時に耐寒耐雪工事を受けている。