From Issue 4/Secret History of Ninja, He is called “Utaka Sempai” in the book (a pun), he is loosely based on Ozaki Yutaka (1965-1992). Utaka guest stars. See rest of book for words.
Secret History of Ninja, Part 2, “Until I Understand Right and Wrong in my Own Heart.” FREE PDF ONLINES (about 100 MB). Smaller version coming soon.