From November 1984, JNR introduced nine sets of 'light-duty cars' designed to cut further costs by installing two-step upright sliding windows and by adopting transfer printing technology for numbering.
同年11月からは、窓の2段上昇化やナンバーの転写表記化など、より一層のコストダウンを図った「軽装車」を9編成投入.。