Last time I passed through Taipei they had a water dispenser by the restrooms that had options for searing hot and "cold" water (it was lukewarm at best). I'd imagine Japan would have something similar.
The system encourages those people to engage in the arms race for the next killer app to earn boatloads of money and win the game of capitalism. Finding people who are genuinely interested in maintaining the infrastructure that makes any of that possible is the problem.
Last time I passed through Taipei they had a water dispenser by the restrooms that had options for searing hot and "cold" water (it was lukewarm at best). I'd imagine Japan would have something similar.