noun
mildly air-conditioned train car
A railway carriage with air conditioning set to a weaker level, often for passengers who prefer less cooling. Commonly seen on Japanese trains.
弱冷房車は冷房が苦手な方におすすめです。
The mildly air-conditioned car is recommended for those who are sensitive to air conditioning.
冷房車 is a general air-conditioned car, while 弱冷房車 specifically has weaker cooling.
Compound of 弱 (weak), 冷房 (air conditioning), and 車 (car). A straightforward modern term.