Green Tower is a 60-meter-high lattice tower with an observation deck at Sanbu, Chiba, Japan. A lattice tower is a freestanding steel framework Tower. It is used as a pylon especially for voltages above 100 kilovolts as a radio tower (a self-radiating Sanbu (山武町 -machi is a town located in Sanbu District, Chiba, Japan, which is now part of the city of Sanmu. For a topic outline on this subject see List of basic Japan topics. Green Tower was built in 1998. Year 1998 ( MCMXCVIII) was a Common year starting on Thursday (link will display full 1998 Gregorian calendar)