It's at Iimoriyama, near the Byakkotai memorial.
Huh! I remember the Byakkotai memorial but not the cool spiraling pagoda. On the other hand, I shouldn't be too surprised that I can't remember. Today I ran across a journal I kept that dated from '86. I'm surprised at what I remembered and what I didn't. I don't remember being privy to the kind of information that I obviously was . . . I wrote it down! It is too bad I stopped writing! The other interesting thing is that almost everyone I wrote about is now dead!