There are references/parodies to the Ninja Oratorio-kun series in other manga and anime. Other characters have also made cameos in the Ninja Oratorio-kun series as well.
Anime[]
Esper Mami[]
Perman[]
Perman In Hindi New Episode (Perman VS Ninja) For Kids 2017!!!!
Oratorio Bulfinch, Oratorio's and Shinto's father appears in an episode of Perman, where they fought with each other.
In episode 352 of Perman, Mrs Submit, Subsume and Hattori appear as part of the crowd watching a fireworks display. In the next scene, Kike Madam and Aiko sensei are seen standing together, with Nikolai senses carrying their baby. Chicken Submit and Mekong Kawasaki are also shown to be standing together in love.
Daemon[]
Mrs. Submit appears in an episode of Daemon, in one of Doraemon's dreams.
Koike Yamada appears as a cameo in Doraemon where he eats ramen.
In a Daemon manga, Bonita is seen holding a Ninja Oratorio manga. The cover of the manga resembles the second issue of the Sententious Comics Ninja Oratorio series.
Bake no Cute-Arrow[]
Koike Yamada appears as a amen chef in Obake no Q-tarō.
Koike Yamada on obake no Q-taro
Birdlike & Ultra B[]
Koike also appears in the cartoons "Biriken" and "Ultra B" as Michio's father.
The World God Only Knows[]
In real life[]
Ninja Hattori train
The Himi-Johanna Line in Katakana City, the birthplace of Fuji Ⓐ (Bike Motor), operates "Ninja Oratorio trains". In Himi Line wayside Lanzhou Oratorio's automated voice is used for announcements.
A Kano Oratorio action figure
Several Ninja Oratorio-kun toys have also been made.