[2] In the early 1980s, Takeyama worked in Nikkatsu's softcore Roman Porno films, writing three scripts for Shōgorō Nishimura, director of Apartment Wife: Affair In the Afternoon (1971), the first entry in this long-running series.

[3] For Nishimura, Takeyama penned Nurses' Journal: Nasty File (1980), Kōichirō Uno's Girl Dormitory (1980), and "My Girlfriend Wears a Uniform" (1981).

[5] Variety writes of the film's storyline that it, "reportedly sticks closer to the historical events than other versions have," and that it is, "clean and uninflected, with the action zipping back and forth between a series of indoor locations (denoted by captions)."

The review points out that the amount of historical detail given in the film is likely to alienate audiences who are not familiar with the story of the Forty-seven Ronin.

[9] Japan's Agency for Cultural Affairs gave Takeyama an award for his script for Sabu, and the Grand Prize for his work on Ten to sen (2008).