The sole two-car set was converted from former Iyotetsu 700 series EMU cars, which were themselves converted from former Keio 5000 series EMU cars, and was introduced to replace the Choshi Electric Railway's 1000 series EMU car number 1001, which was withdrawn in February 2016.

[3] Following conversion, the train was repainted into a livery consisting of light blue upper body and dark blue lower body separated by a thin white stripe.

This livery was based on that applied to the line's former Yu 101 open-sided special-event car nicknamed Miotsukushi.

[4] The two cars were built in 1963 for Keio Corporation in Tokyo, and resold to the Iyo Railway in Ehime Prefecture in 1988.

[5] Shipping and conversion work cost an estimated 75 million yen, funded partially by grants from the national government, Chiba Prefecture, and the city of Choshi.