If Inuyasha lets go of his sword he goes crazy with his power that's otherwise locked away awakening and going berserk, if Zenki picks up the golden axe he goes crazy in the same way... I'm guessing that I can expect Chiaki to be all Kagome in a future episode and bring Zenki back to his sense maybe? Oh wait, Zenki was made before Inuyasha, so Kagome is the one acting like Chiaki. XD
I found some more similarities between Inuyasha and Zenki. Continued from here:
http://turkmikari.livejournal.com/217583.html - There's a weapon that affects the main guy's power.
- There's a monk that travels around with the group.
- An ally was brainwashed and forced to work for the villains.
- There is time travel from the modern age to the feudal era.
- There are mythological creatures.
- There's a tree that's significant to the plot.
- There are small magical items that induce transformations and create troublesome beasts.