Painter Hamaji Seimatsu was born in 1885 in Kushimoto, Wakayama prefecture. In 1901 he travelled to California in the States to stay with his immigrant brother. There he decided to study art and he graduated from the Boston Art School. In returned to Japan and two years later found his own school in Shingu called "Shingu Foreign Art School". In 1925 travelled back to the USA and then to Paris returning to Japan two years later showing his work in numerous exhibitions.
During the war he visited the battlefront in central China with other artists and displayed his work in a War Art exhibition in Tokyo.
He passed away in March 1947.
The piece featured here was captioned: "Middle of August 1941. The aircraft is getting ready for another bombing mission against Chongqing from central China".