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...

Kanzo Hattori, an Iga ninja, and his younger brother Shinzo are training in Tokyo. Kenichi, an elementary school student, lets the two of them stay and lives with them as if they were brothers, and one day he steals a picture diary written by Hattori (Kanzo). What was written there was that Shinzo became friends with a cute girl, Shinobino Ohime, and began to develop a relationship with Robomaru, a robot ninja of machine style ninja...

Pen-Pen, the hat-and-tie-wearing prince of Penguin Land, turns up unexpectedly on little Mika's doorstep. and invites himself and his zany friends to stay.

A wind has swept the Earth taking all the memories from everyone. No one knows who they are, how to speak, or how to use the tools of modern civilization. Two years later, a young man who has been re-educated travels across America on a mysterious journey.

Join Godzilla and his Monster Island buddies as they learn how to count.

Join Godzilla and his Monster Island buddies as they learn how to read hiragana.

Join Godzilla and his Monster Island buddies as they learn subtraction.

Join Godzilla and his Monster Island buddies as they learn addition.

Shin-chan must rescue the adults of Kasukabe when they mysteriously abandon their responsibilities to relive their youth at the new 20th-century expo.

The rural American west is the setting for this OVA, in which a bizarre and brutal attack on a NASA base in Arizona attracts the attention of a French secret service agent, Monsieur Lassar, when a dead CIA agent is found floating on the Seine in Paris. Lassar is convinced that these two events are related, and sets out to prove it. His investigation leads him to film star Lamia Vindaw and a vampire cult that may be far more vicious and dangerous than its eccentric exterior makes it seem.