An essay that examines how colloquial tanka techniques developed and became formalized. It offers an academic attempt to organize the expansion of tanka style.

It traces how choosing colloquial language broadened the expressive range of tanka.

An essay that traces the shadow of a vernacular revolution in tanka history while considering the new expressive possibilities brought by colloquial language. It opens up a broader theoretical frame.

It reconsiders the history of tanka expression through the trial and error surrounding colloquial language.