The first film of the Fuku-chan trilogy. Based on a popular newspaper comic strip at the time, Fuku-chan was re-invented for propaganda use.

Fuku-chan was one of the most popular newspaper comic strip boy-characters in Japan at the time. The film portrays a submarine attack on an enemy cargo ship. Though this, too, was to boost patriotism, Japanese children particularly enjoyed the scenes in which the kitchen crew cooked in the submarine kitchen. Released in November of the same year, the food shortage was quite serious in Japan, and the abundant food supply in the submarine kitchen -- vegetables, fruit, fish, rice, and more which were already luxury items in Japan at the time -- was prepared into various dishes along with a merry, rhythmic song.

[Source: AniDB]

The second film of the Fuku-chan triology. Based on a popular newspaper comic strip at the time, Fuku-chan was re-invented for propaganda use. In this one Fuku-chan tries to rally up the fighting spirit of the troops.