"The Hidden Blade" is director Yoji Yamada's filming of the period drama again after "Twilight Seihei". The production is basically the original crew, and the material is also the novel of Fujisawa Shuhei. This is also the second costume drama that he and Shuhei Fujisawa once again co-created on the stage of the weak local feudal clan in the last years of the Shogunate .
In June 2003, director Yoji Yamada began to write a script based on the original work of Shuhei Fujisawa. He intertwined and adapted the "Hidden Sword Demon's Claw" from the series "Hidden Sword" by Fujisawa Shuhei and his short story "Snow Light". It is based on the era of the shogunate that lasted for 300 years in Japan. The former focuses on telling various stories about the world of samurai swordsmen, while the latter focuses on the secret love between men and women. The film integrates the contents of the two novels, and on the basis of insisting on maintaining the work of Fujisawa Zhou Pingyuan, another film describing the fate of the last generation of samurai is constructed .
During the script creation period, he did a lot of actual historical data collection work, and also made a field trip to the Kaisaka clan in the play, that is, Okazuru City in Yamagata Prefecture, Japan. At the end of November 2003, Director Yamada handed in the first draft. The film really started in early 2004.
