An animated pilot film for Ninja Bugei-chou released to the public over three decades later on Ninpuu Kamui Gaiden DVD volume 7.
 
The pilot film was created in 1969 as director Nagisa Ooshima was wanting to make a TV animation to build off his controversial film from 1967. The pilot was rejected by Shirato himself (the original comic creator the film was based on) and the plan was changed to animate Ninpuu Kamui Gaiden instead, a side story to the Kamui Den manga also created by Shirato. Though with this change, Ooshima did not partake in Ninpuu Kamui Gaiden's production.

The final cour of Tetsujin 28-gou, which aired half a year after the end of the first season.

Unreleased episodes of Skyers 5 released to the public nearly five decades later on the HD Remaster DVD-BD Box Set 1.

A time patroller from the 30th century goes back to the 20th century to stop a meteor from destroying the world. 
Note: The final 26 episodes are in color.

Donning a special mask, a young man defends the planet. 
(Source: AniDB)

Born from the beautiful green jade that shines brilliantly, the ghost Onbuu is carefully raised by the grandpa Ojii, the village's number one blacksmith. The series tells short stories based on Japanese folk tales, while Onbuu enjoys the days of playing with Ojoo and the Kan Gon-chan brothers. 

Bouken Gabotenjima is about children who are shipwrecked on a desert island.

A private investigator working a routine case involving stolen technology is mortally wounded. His only hope for survival comes from sacrificing his humanity to become 8Man -- a powerful cyborg crime-fighter enhanced with a living human brain. Resurrected as the ultimate high-tech vigilante, it is up to 8Man to bring the lawless to justice and put an end to the escalating cycle of violence. A classic animated thriller that will leave you breathless. 
(Source: AnimeNfo.com)

Dr.Haneda was developing experimental giant robot warriors to fight the allies during the Second World War, but before his creations could see action, Allied bombs destroyed the facility and killed him. A decade later criminals discovered two of the surviving prototypes, #26 and 27 in the series, and used the remote controlled robots to commit a number of crimes. Young Shotaro Haneda, the twelve year old son of Dr.Haneda, did some investigating and discovered that the mob were hunting for the twenty-eighth robot in the series, rumoured to be the most powerful of them all. Racing the villains, Shotaro discovers the robot first, along with Dr.Shikashima, a colleague of his father's who was also believed killed by the Allied bombing. Together the two prevent Tetusjin-28 (the robot's official designation) from falling into the hands of the bad guys, and decide to dedicate him to peace rather than war. 
Shotaro fought crime for a long time, supported by Dr.Shikashima, who would repair Tetsujin-28 when he was damaged, and by police officer Otsuka. Shotaro even battled the alien Magmans, invaders from the planet Magma, who came to Earth late in his career, bringing their own giant robots, Magma X and Gold Wolf, with them.

TCJ