Madame, your toilet is served!
When you’ve finally made it to the head of the line in the ladies room at Maihama Station, this nifty light-up board discreetly tells you which stall to run to, the very instant it’s free. Not only that, easy-to-understand diagrams inform you which style is available: Japanese or Western.

Woah, woah — what is a ‘Japanese-style’ toilet??
I’m picturing the bathroom I used to use regularly when changing planes at O’Hare.It was voluminous, and could really have used one of these.