Why Do Japanese Toilets Have Sinks on Top?

Ever wondered why some Japanese toilets come with a sink on top? This video dives into the ingenious design of these eco-friendly toilets, explaining how the sink atop the toilet isn't just for space-saving-it's a smart way to conserve water too. While primarily used for handwashing, these sinks are specifically designed to optimize water usage and are not meant for other typical bathroom sink tasks.