Junichi Miyashita

A short film that takes place after the TV show.

Princess Rangiku lost her entire family to Lord Karimata, who invaded her home seeking her father's life work, puppets with unique capabilities. As her duty, Rangiku sets out with three of her father's greatest puppet warriors to seek revenge. She can manipulate these to battle the strongest of warriors, however manipulating the puppets leaves her own self vulnerable to direct attacks, so she seeks a ninja warrior named Manajiri to aid and protect her in her quest. (animenewsnetwork.com)

Kaito Kuroba, a normal teenage student whose father is often absent for vaguely defined reasons. (myanimelist.net)

Ten thousand years ago, a massive battle known as the Battle Royal was fought by fifty-two Undead, each representing a species fighting for dominance over all others. The winner was the Human Undead, known as Category Two of Hearts, giving dominion of the Earth to humanity. In the present day, archaeologists discover the sealed Undead, and accidentally set them free. Thus, a new Battle Royal begins. (mydramalist.com)

According to an ancient legend, mermaid's flesh can grant immortality if eaten. 500 years ago, Yuta unknowingly ate a piece of mermaid's flesh. For centuries, he travels across Japan, hoping to find a mermaid, thinking she may be able to make him a normal human again. When he finally finds one, he discovers that she and her companions have been raising a girl to be their food so they can eat her and take on her youthful looks. That is how mermaids stay young. (myanimelist.net)

Tokusou Robo Janperson the Movie is a film adaptation of the Metal Heroes series of the same name taking place between episodes 11 & 12.

The first two episodes of the series in Movie format. (wikipedia)