ZENRIN Residential Maps of Japan form the foundation of ZENRIN's business and are the nucleus of our product lineup. The information in our maps is meticulously gathered by our skilled field surveyors. Our detailed maps feature the names of each building and residence, as well as roads and traffic information such as street names, bus stops, traffic lights and one-way streets. Our city maps are updated annually and others every two to three years to ensure customers are provided with the latest and most accurate information. ZENRIN's maps cover an amazing 1,740 (or 99%) of Japan's 1,750 cities, towns and villages (as at March 31, 2010), and are a vital source of information for individuals and businesses, including fire, police, governmental and delivery services.