Group vs. individual biases are culturally and historically determined, but the politics or ideology they manifest in modernity are not. Anarchism, socialism, and communism all had mass appeal in prewar Japan and the Japanese Communist Party (JCP) was a powerful political force in the early postwar period, being one of the few groups that rightfully opposed the fascist war that led to so much death and devastation.
So powerful in fact was the JCP, that the American occupation force used the threat of its rising power to coerce the defeated fascists into alliance with them and constitute what is now know as the Liberal Democratic Party. From here, it was a mere matter of providing them with massive subsidies and intelligence gathered on their opponents on the left-
https://www.nytimes.com/1994/10/09/world/cia-spent-millions-...
-and use the resulting power to produce a social, political, and economic order that was conducive to US interests.
I’m not certain what you’re getting at with regard to being “foreign” to American ideology, but authoritarianism is certainly not, if evidenced only by its long history and support of right-wing, authoritarian regimes.