An external site ( http://www.gogameworld.com/article/gomyth.php) made a casual reference to Go Seigen being excluded from the the Honinbo tournament. I had not heard this before. I was wondering it it was true, and it was a part of his status as a foreign player within the Nihon Ki-in.
I didn't want to clutter his page with my lack of knowledge, but if true, it might be worth mentioning the conditions under which he played in Japan.
GoGoD confirms this:
"Problems connected with his support for an anti-American religious group" - I want to know more about this religious group, sounds fascinating and I wonder how this can effect the Nihon Ki-in at all, were they sponsored by the U.S.?
Note that his involvement with this religious group and his independence of the Nihon Kiin are not claimed to be related by GoGoD. GoGoD simply gives several reasons that Go Seigen did not play as often as you'd expect.
According to the Pieter Mioch Interview (See part three):
According to Gobase, Go Seigen became a naturalized Japanese citizen in 1936 and again in 1979, so there was some problem surrounding his citizenship somewhere in between, but I wouldn't know the exact period, or what the issue was. GoGoD mentions this simply as "in the years after the war".
Note also that Go Seigen did participate in the first Honinbo tournament (see: Honinbo#toc3).
Much of this is covered in my book Kamakura, and there are further details in Final Summit (Go-Takagawa) which is due to appear any moment (November 2009). This adds substantially to the GoGoD account.
The situation was much more complicated than appears from the one-liners give here. You can only really make sense of it if you also know the context.
This page also makes a major mistake in risking conflating two religious movements Go was connected with. The one that caused problems was Jiukyo.
Thanks for the clarification, John. I'll check Kamakura tonight.