Keishi Ōtomo is a Japanese film director and screenwriter. He is known for psychological thrillers and historical dramas, as well as adapting a variety of manga and novels to film, including The Vulture (2009), Ryōmaden (2010), and the Rurouni Kenshin film series. Ōtomo’s awards include the Audience Award at the 18th Fantasia International Film Festival in Montreal (2014), the Popularity Award at the 38th Japanese Academy Awards (2014), and Best Director at the 31st Japanese Critics Award (2022).

Ryōmaden (龍馬伝) is the 49th NHK Taiga drama. It was shown on NHK from January 3 to November 28, 2010, spanning 48 episodes. The story centers on the life of 19th-century Japanese historical figures Iwasaki Yatarō and Sakamoto Ryōma. It has been announced that the series will be aired in several other countries, for example Hong Kong, South Korea, Taiwan and Thailand.