This will be Watanabe's first appearance in a period drama thus she has to learn how to play the zither and Japanese dance. Despite only learning the zither for 2 hours, she managed to play it during the filming which surprised the production staff. Watanabe commented that although she was apprehensive about appearing in a period drama, she was also thrilled at being given the chance. She also thanked Sawajiri for helping her to get over her nervousness as the latter took the initiative to talk to her.
Source: Sankei Sports