This is exceptionally Japanese flavored movie, and I'm not sure if the underlying culture is appreciated by audiences outside of Japan.
Hanako (Nobuko Miyamoto) loves super (Japanese for supermarket). One day she meets Goro (Masahiko Tsugawa) at his rival super market Yasu Uri no Daimao ( which roughly translates to Demon King of Discount). She points out to Goro all the faults of the store. Then Goro asks Hanako to come and check out another store. Hanako points out all the faults of that store too. The store turns out to be Goro's own store. Goro asks Hanako to help him turn the business around. Hanako accepts and becomes the head of cash register. She starts to modify the way business is done at the store, and gradually, the store starts seeing more and more customers.
Itami's movie portrays people in compromising position in a comical way. This movie shows the underlying business culture of Japanese supermarkets. Dated meat are ground into ground beef, cutlet that didn't sell yesterday are packed into bento lunch, they unpack yesterday's food and repacks it again and tacks a new date to it. All this to save money. Hanako opposes these business practices head on, and transforms the store into epitome of well run business. But she also encounters many difficult oppositions.
The movie follows the usual Itami's formula where hard working character portrayed by Miyamoto brings success to the business run by Tsugawa. The details are so interesting, it keeps you involved in the story. Some of the ways people react is difficult to understand because it's so Japanese culture specific. Even then the movie is entertaining, and intriguing.
One of the last movies made by Itami is a good production with many interesting plots.