The Obake Zukan series illustrates various monsters and spirits and explains why they are scary. (Source: ANN)

Sequel of Shin Obake no Q-tarou.

The anime will depict various vehicles as characters in the "Mobile Land" island. The protagonist Car-kun arrives at the island as a delivery worker. Through his deliveries, he gets to know the residents of Mobile Land, all while following traffic rules and having his deliveries stopped by the meddling Sabibi. (Source: ANN)

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.