Keiko Hanagata was a Japanese voice actress and children's book author, active in the industry from the mid-1960s until her passing in 2015. She was born on June 2, 1935, in Tokyo, and was married to fellow actor and voice actor Daisaku Shinohara. Throughout her career, she was affiliated with several talent agencies, ultimately being represented by 81 Produce at the time of her death on January 12, 2015.

Hanagata's career encompassed a wide range of roles in television anime, OVAs, foreign language dubbing, and puppetry. One of her earlier and most recognized anime roles was the sushi shop owner's wife in the 1972 series "Dokonjō Gaeru" (Rootsical Frog). She also voiced the character Hōin in the 1975 historical anime "Shōnen Tokugawa Ieyasu," a role that aligns with the user's query. Another notable performance was as the mother in the 1974 comedy anime "Hajime Ningen Gyatoruz," which focuses on the adventures of the first humans on Earth.

Her anime filmography spanned several decades and included a variety of characters. In the late 1970s and 1980s, she took on roles such as Magdalena in "Haha o Tazunete Sanzenri" (1976), Omuro in "Taiyō no Ko Esute" (1982), the mayor's wife Frances in "Shōkōjo Sēra" (Princess Sara) (1985), and Elizabeth H. Harrington in "Ai Shōjo Pollyanna Monogatari" (1986). In the 1988 OVA adaptation of the epic novel "Ginga Eiyū Densetsu" (Legend of the Galactic Heroes), she voiced the mother of Mittermeyer. Later roles included the art director in a 2005 episode of "Glass Mask" and a character in "Wonder Bebil-kun" (2003).

Beyond anime, Hanagata was highly prolific in providing Japanese voiceovers for foreign films and television series. Her most significant contribution in this field was as the regular voice of Miss Moneypenny, the secretary to M, for many years in the Japanese television broadcasts of the James Bond film series, starring Lois Maxwell in the role. She also lent her voice to puppetry shows, with early work including Gladys in the 1966 Japanese adaptation of "Thunderbirds" and later roles in historical puppet dramas like "Shin Hakkenden" (1973).

In addition to her performance career, Keiko Hanagata was also an accomplished author. She wrote several books, including works on language and living well for adults, such as "Kotoba Bijin wa Kurashi Jōzu" (1988). She also created numerous picture books and story plays for children, often collaborating with illustrator Yōko Kitayama on series like "Ohanashi Asobi no Ehon" and the "Romichan Mūchan Ehon" series.