Frustration levels are running high among train and subway commuters amid a spell of uncomfortably hot weather this summer, driving many to demand cooler trains.
But railways face a dilemma in responding to such requests, because they know that even if they satisfy some commuters by lowering train car temperatures, there will always be others who complain that it's too cold.
Since April, the Tokyo Metropolitan Government's Transportation Bureau, which operates the Toei subway system, has received some 70 complaints that trains are not cool enough.