TOKYO - Japan’s leading toilet giant opens a new museum this week dedicated to a century of lavatories, from its first water flushing model to the most cutting edge version with odour-neutralisers and variable water jets. The museum operated by TOTO - best known for its bidet-equipped Washlet series - opens its doors on Friday in the southwestern city of Kitakyushu, where the company is based. High-tech toilets, common in Japan, regularly win praise from foreign tourists and celebrities as the epitome of Japanese know-how - a contraption that offers both comforting warmth and a frighteningly accurate bidet jet.