https://myanimelist....514#msg70751514
gotta love how the minato manga brings us ns fans out of the woodwork
...Again, Other because you watched it, you assume Kishimoto must have watched it, and been inspired by it. When there has never been mentioned of it in any interview.
What has been mentioned is Slam Dunk, (and how it inspired the Naruto-Sakura-Sasuke dynamic,) which I assume you haven't read/watch.
Other there is a difference between speculating that Kishimoto may have been inspired by something and declaring it to be true. There is no evidence of him being inspired by that dragon quest anime, there is of him being inspired by Slam Dunk.