[1] All 3100, 3500, and 3700 series trainsets bore the Meitetsu all-red livery from new.

From 5 June 2019, 3100 series sets were repainted to a red-and-white livery matching that of the 2200 series, starting with set 3107,[2] as the two train types frequently operate in multiple with each other.

From fiscal 2017, 3500 series sets have undergone a programme of refurbishment.

The work includes the installation of new traction equipment, full-color LED destination indicators, door chimes, and LCD passenger information displays.

The first set to be treated, 3501, underwent test operation in August 2017.