The Japanese government has collected 418 shells believed to be wartime chemical munitions abandoned by the Imperial Japanese Army in Dunhua in China's Jilin Province, the Cabinet Office said Wednesday.

The project to collect and dispose of abandoned chemical weapons began Aug. 22 and ended Monday. A total of 438 shells were found, 20 of which were confirmed not to have been left by the Imperial army. Those shells were turned over to Chinese authorities.

The project, which is supported by the Chinese government, is the third such effort, following one from last October to November and one from May to June.