This kind of reading differs from more conventionalized Japanese practice, which seeks either to reduce kokugaku to ideological complicity or to establish its unity and coherence, to repair any inconsistencies by referring to the author's philosophy or by inserting the writers of the texts into the contemporary context.
Its a very good book, Harootunian is a fantastic historian with original ideas, however he is the WORST writer I have ever seen. You'll get a lot out of it, but reading this was a very slow and painful process. You'll have to read everything about 3 times, and even then you wont quite get it. And he loves the word 'discourse', though he doesn't always use it in the right way