Hanakami is a pink sake that was named after the novel "Hanakami" by the fourth-generation brewer, Utsunomiya Shigeaki, who wrote a 12-page letter to author Ryotaro Shiba, pleading with him to name this flower-colored sake after the novel. Shiba kindly agreed with the request, sending a handwritten postcard. The novel "Hanakami" tells the story of the Meiji Restoration patriot Omura Masujiro and Philipp Franz von Siebold's daughter, Kusumoto Ine. The brewery's location in Unomachi, where Ine trained as a doctor under Ninomiya Keisaku, a disciple of Siebold, also has a connection to the novel.