The Japanese high-tech toilet wars "started in February, when Matsushita engineers here unveiled a toilet seat equipped with electrodes that send a mild electric charge through the user's buttocks, yielding a digital measurement of body-fat ratio. Unimpressed, engineers from a rival company, Inax, counterattacked in April with a toilet that glows in the dark and whirs up its lid after an infrared sensor detects a human being. When in use, the toilet plays any of six soundtracks, including chirping birds, rushing water, tinkling wind chimes, or the strumming of a traditional Japanese harp." That was just the beginning.