The Wikipedia article cites p. 61 of Brian Victoria's Zen War Stories as evidence of the re-creation of the Kokuryukai. The citation comes from Victoria's chapter on Omori Sogen, subtitled "The Dr Jekyll and Mr Hyde of Zen."
Victoria's chapter, indeed the whole book, is very much worth reading, for it gives a general context to Omori Sogen's creation of the Kokuryu Club that one would never suspect from reading the English Wikipedia article about him. Omori Sogen was one of those Japanese budoka--there are others, who found it very hard to accept Japan's defeat in 1945. Some worked very hard to maintain the 'mission statement', as Ellis puts it, even if the mission could no longer be carried out. The mission arose from the myths of Japan's spiritual uniqueness and its 'divine' mission to lead the rest of Asia in a 'Showa Restoration', that led to the military conquests from 1931 onwards.
The fact that the Yasukuni Shrine exists and flourishes is some evidence that the myths have never been finally laid to rest.
Peter Goldsbury,
Forum Administrator,
Hiroshima, Japan