Tetsuko Kuroyanagi (黒柳 徹子, Kuroyanagi Tetsuko, born August 9, 1933) is a Japanese actress, television personality, World Wide Fund for Nature advisor, and Goodwill Ambassador for UNICEF. She joined NHK Broadcasting Theatre Company as the first television actress in 1953. In 1954, she made her debut as the lead actress in the radio drama Yambō Nimbō Tombō. In 1976, the TV Asahi's Tetsuko's Room (Tetsuko no Heya) started airing. This program was recognized by the Guinness World Records in 2011 for having the highest number of broadcasts by the same host. It has been airing on weekdays at noon every week, and as of 2023, it has surpassed 11,000 episodes in its 48th year. Her autobiographical book, Totto-Chan: The Little Girl at the Window, which depicts her childhood, became a post-WW2 bestseller with over 8 million copies sold in Japan and 25 million copies worldwide. It has also been adapted into a television series twice.

She is also known for her charitable works, and is considered one of the first Japanese celebrities to achieve international recognition. In 2006, Donald Richie referred to Kuroyanagi in his book Japanese Portraits: Pictures of Different People as "the most popular and admired woman in Japan." Kuroyanagi founded the Totto Foundation, named for the eponymous and autobiographical protagonist of her book Totto-chan, The Little Girl at the Window. The Foundation professionally trains deaf actors, implementing Kuroyanagi's vision of bringing theater to the deaf. In 1984, in recognition of her charitable works, Kuroyanagi was appointed to be a Goodwill Ambassador for UNICEF, being the first person from Asia to hold this position. During the late 1980s and the 1990s, she visited many developing countries in Asia and Africa for charitable works and goodwill missions, helping children who had suffered from disasters and war.