Kazuko Watanabe 渡辺和子 (February 11, 1927 – December 30, 2016) was a Japanese religious sister, educationist, and writer.

Her father was Jōtarō Watanabe, lieutenant-general of the army and a commander of Asahikawa 7th Division.

In 1936, when she was 9 years old, her father, general and educational commissioner at that time, was killed by young officers of a rebel group in the February 26 Incident.

She was traumatized by having to watch as her father was mowed down by 43 bullets; the executioners standing one meter away.

In 2012 her book Bloom Where You Are Planted (original title in Japanese) became a bestseller and sold more than two million copies.