To Clearwing Yuto
Just saw your review idea on Terran Alliance strikes back review which involved the line from Return of the Jedi audio, I actually using the audio line for my Vader's redemption scene idea for XxTheTruMan196's Galactic Civil War story, check it on the Shaniverse wiki, check story section on the top, then side stories and click on Galactic Civil War and go to the comment section.

To author
There is also Ninja Captor.

To author
There is Gatchman and Ninja Senshi Tobikage or Ninja Robot on Cartoon Network.

Well, You asked for a suggestion about Ninja realted media, the things I can think of are maybe Kamui Gaiden, Shinobido, Shinobi Series (different from the last one), Strider Hiryu, Onimusha, and Ninja Gaiden.

Welp those are the suggestion I could give. As for your story it still developing so I won't delve to much on it.

So, see ya later!

To Clearwing Yuto
There is also Flame of Recca, a Ninja themed anime/manga, check it out.

Kamen Rider Shinobi x Harem

To author
Will Uncle Chan give both the Hanzo and Hebijo schools a warning not to combine both the Twilight, Yin, and Yang scrolls together or else something very bad will happen? Even I think that Orochi would even try to combined both the Twilight, Yin, and Yang scrolls together, to him, I think that would be suicide.

To author
I have some ideas for Shinobi's rider kick finishers for Aqua, Fire, Wind, Earth, and lightning forms.
1. Aqua Rider kick: Flying side kick
2. Flame Rider Kick: Corkscrew kick
3. Wind Rider Kick: Roundhouse axe kick
4. Earth Rider Kick: Drop kick
5. Lightning Rider Kick: axe kick
What do you think?

To author
My idea of Shinobi teaming with Henshin Ninja Arashi would involve the origins of the Maijin, what do you think?

Nice chapter, and also for giving more development to Asuka and Homura, let's say that I'm surprised that even Auka vented a bit of anger while she has the reason to do it, as Homura also seemed very proud of herself and does not want to be commanded from someone who shows more superiority than her and look at her from top to bottom, which is justifiable, but for now Yukio and Homura will just have to refrain from their ligites aside together with Asuka have to run away from the dark realm, but in time I'm sure she She will slowly start to have a crush on Yukio over time as Asuka after a few more chapters, and I'm pretty sure that Yumi and Miyabi will also take a crush on Yukio.

Let's say Asuka, Homura, Yumi and MIyabi are always put together like Senran Kagura quartets, which comes to mind if they are like main girls for Yukio or something. Since always on the wallpaper the four of them were always together as if to say: "We are the main girls!" thing like this. Maybe it will? But I hope so, at least until the story develops for a while, and I'm sure there will be a triangular love with Yukio, Asuka and Homura first, then a quartet adding Yumi and a quintiplo adding Miybi. I'm sure these main girls would become Yukio's harem officers or something, of course I don't want to think too much for you, I'm sure someday you can sort it out by yourself.

While as for the crossover characters who collaborated with Senra Kagura, I recommend you use the girls who are Senran Kagura crossover officers instead not the chosen ones, and then I know you don't know, but Npetune from Hyperdimension is a part of these too, I was completely skeptical but okay, after all they did with Gun Girls Z's Honkai Impact 3rd and Azur Lane, so nothing impressive or anything. Good luck with your story! And take a look at mine too.

Which Seirei is going to be Yukio's Earth Ride Shuriken? That's something that I want to know.

So far so good
What do you think about kamen rider saber crossover with fairy tail on future story?
Oc pairing with Lucy

Do you think kamen rider shinobi will go berserk and out control
At future yukio accidentally almost kill asuka and he shut down
Himself

You're Welcome.

To author
I have a Star Wars fanfic series I recommend reading, the Legacy of Jarik Shan by XxTheTruMan196, he also has a wiki called Shaniverse wiki, be sure to check it out.

To author
Yes, I have watched Xiaolin Showdown, good times. You going to based a female general off of Wuya?