| Release Date | 1983-03-12 |
|---|---|
| Runtime | 53 minutes |
| Genres | Animation |
| Stars | Junko Hori, Masako Sugaya, Yuko Mita, Kaneta Kimotsuki, Kenichi Ogata |
| Directors | Hiroshi Sasagawa, Shinichi Suzuki, Yoshitaka Gokami, Tsukasa Dokite, Tomokazu Kimura |
Hattori-kun received a letter from Iga's father asking him to take his friends and return home for spring break. Hattori-kun leaves for Iga with his younger brothers Shinzo, Kenichi, Yumeko-chan, and others. However, a suspicious shadow stares at the group... He is a subordinate of the scientific ninja Mechamaro, who has replaced the power of ninjutsu with the power of science. Mechamaro was plotting to confront Hattori-kun in order to prove the strength of scientific ninjas. And in order to occupy Iga no Sato, Hattori-kun sends a fake letter...
