It tells the story of Nobita Nobi and Doraemon traveling back in time to Japan during World War II to rescue an elephant destined for slaughter.
Nobita and Doraemon were both very angry, while the keeper said it was an order from the government and that they did not want the animals to escape after the bombing.
The keeper went to report to the zoo's director, who was being harshly lectured by a Japanese military officer, and they argued about the elephant.
[7] In 1943, the zoo carried out a mass killing of animals based on the "Predator Extermination" (猛獣処分) issued by the Mayor of Tokyo, Shigeo Ōdachi.
Except for some small animals not covered by the order, only Wanri survived temporarily due to her ability to recognize poisonous food and the secret feeding provided by the zookeepers.
[9] The official explanation from the Japanese government for this policy was to prevent animals from escaping and threatening people if the cages were damaged during air raids.
They used this cruel practice to brainwash the Japanese people and prepare them to sacrifice their lives for the "empire" as if they were animals.
[7] The 2017 reset version is the first episode of the "Power Up Doraemon", directed by Shinnosuke Yakuwa and supervised by Yoshihiro Ōsugi.
[10] Ōsugi added that creating content related to war required a great deal of determination and courage.
However, they believed that this story was distinct from traditional war-related works because the characters, Doraemon and Nobita, who traveled back in time, had modern thoughts and were unafraid to express their opinions to the people of that era.
[10] An article in the People's Daily proposed that the 2017 version of the animation conveys a thematic message closer to the manga.