An unknown buyer acquired 0.43% stake in Koatsu Gas Kogyo Co., Ltd. (TSE:4097) on September 30, 2011. The buyer acquired 0.24 million shares in the transaction. There is no effect expected on the performance of Koatsu Gas Kogyo. An unknown buyer completed the acquisition of 0.43% stake in Koatsu Gas Kogyo Co., Ltd. (TSE:4097) on September 30, 2011.