Upvoting because although I disagree strongly with "dead end" (something more like "closed world", maybe), this is a critical aspect of Mishima. His policy was thoroughly anti-Western but his ideology was heavily influenced by German philosophy and he had many personal and professional contacts with westerners.

Mishima is among the first to embody his conception of Yamato-damashii in the same way Ta-Nehisi Coates labeled Donald Trump the US's "first white president" - not literally the first, but the first who needed to frame it explicitly in antithesis.