The same section you quoted from discusses the cyclical nature of popular acceptance of continual claims of Japanese superiority, ebbing with the immediate post-war hardship and flowing with the actual economic takeoff of the following decades. The sentence immediately following your first quote is: "A major controversy surrounds the question regarding the affiliation of the post-war nihonjinron theories with the prewar conceptualization of Japanese cultural uniqueness," which speaks to the ongoing and historical nature of these "exhortations" and supports my rebuttal.