Niimi Nankichi (July 30, 1913–March 22, 1943) was a Japanese author, sometimes known as the Hans Christian Andersen of Japan.

Niimi was born in Yanabe, Handa Aichi. He lost his mother when he was only four years old. His literary skill was already noticeable at an early age. During his elementary school graduation ceremony, he presented a haiku that impressed most people at the ceremony:

The Dandelion

So Many Days Trampled

Today’s Flower

At age 18 Niimi moved to Tokyo to enter the Tokyo University of Foreign Studies. He fell sick with tuberculosis while in Tokyo shortly after graduating, and returned to his hometown. He worked there, first as an elementary school teacher, then as a women's high school teacher. He died at age 29. Although not prolific, he shows great talent in all of his writings. His works are known for their accuracy and lively depictions of humans. He is also often compared to Kenji Miyazawa. There is a Niimi Nankichi Memorial Museum in his birthplace, Handa.