In Japan, the launch of Lexus was complicated by Toyota's existing four domestic dealership networks at the time of its introduction. The Toyota Crown and Toyota Century were exclusive to "Toyota Store" locations. During the LS 400's development, local dealers' requests for a Japanese domestic market version had grown, and a right-hand-drive Toyota Celsior-badged version was introduced shortly after the LS 400's U.S. debut, and introduced 9 October 1989 and only available at "Toyopet Store" locations. The Celsior, named after the Latin word for "supreme", was largely identical to the LS. Models came in either basic "A", upgraded suspension "B", or fully equipped "C" trim specifications. The Crown and the Crown Majesta, which appeared later in 1991, were only available at "Toyota Store" locations which carried Japan-only Toyota luxury models, like the Century. Ownership costs for Japanese drivers are expensive due to Japanese Government dimension regulations and annual road tax obligations. Owning a Celsior in Japan is also considered extravagant due to urban two-way streets are usually zoned at or less, as mentioned in the article "Speed limits in Japan". The Celsior introduced two world firsts: high-performance twin-tube shock absorbers and an air suspension combined with an upgraded version of Toyota's semi-active dampers Toyota Electronic Modulated Suspension, called Piezo TEMS. This was ahead of its time: Mercedes-Benz first introduced a similar electronically controlled air suspension on the 1999 Mercedes-Benz S-Class (W220) (Airmatic).