On the surface, Japan’s train station employees might appear deferential, profusely apologizing for the slightest delay and helpfully guiding passengers through the intricacies of the various transport hubs dotting Tokyo.

On the inside, however, a darker side of their personality seems to exist.

To get an idea of just how frustrated some might be, look no further than a recent social media trend that has seen such workers anonymously unleash scathing posts on Twitter as they rant about the stressful side of their job — in particular, their experiences with kasuhara (harassment by unpleasant customers).