One more video from the NHK collection featuring Nakajima E8N "Dave" seaplanes in action. According to the commentator, seaplane units based on Yangtze river operate against targets in Hunan and Jiangxi provinces. The ground crew members prepare and bomb-load the seaplanes for one more mission against junks sailing the river carrying provisions and enemy positions in Jingdezhen, Jiangxi province. The video was shot on August 26, 1941.
I hope David can identify the unit from the tail marking.