Today, with the growing Liquefied Petroleum Gas (LPG) consumption in emerging countries and the growing production of associated gases from natural gas and shale gas, it is expected that seaborne trade of LPG will increase and its trade routes will be diversified. Mitsubishi Heavy Industries, Ltd. (MHI), which has continued to develop LPG carriers to meet the needs of the era, has focused mainly on building an 83,000m3 type LPG carrier as a flagship model to meet large capacity demands since 2006. On the occasion of latest upgrade aimed at the improvement of fuel efficiency and environmental friendliness, we newly developed a cargo tank to realize customer benefits of high reliability and low maintenance costs. This tank has already been approved by several classification societies and the United State Coast Guard (USCG), and has been applied to an LPG carrier delivered in 2012. We will actively conduct sales activities and continue to improve further to meet customer needs.