(23 June 1889 â 29 December 1964), better known by his pen name , was a Japanese poet, children's book author and essayist. He is considered a significant representative of Japanese symbolism.
Miki was born in Tatsuno in Hyà Âgo Prefecture in 1889, the oldest son of Setsujirà  Miki and Kata Midorikawa (1869âÂÂ1962). Midorikawa married at 15, and was a nurse and a significant figure in the women's movement of the Meiji period. He had one brother, Tsutomu. After the divorce of his parents in 1895 when he was 5 years old, Miki grew up with his grandfather, who was the first mayor of Tatsuno. He attended elementary and middle school in Tatsuno and wrote poems, haiku and tankas as a student.
At the age of 17, he published his first collection of poems, and at 20 his poetry collection Haien, which received attention at the time for its free verse. Miki was regarded as an early talent and he gained attention along with Hakushà « Kitahara, to whom he has been compared in style and stature.
He studied literature at Waseda University and Keià  University. Around 1918, he joined Miekichi Suzuki's recently founded children's literature magazine Akai tori (, "Red Bird"), to which he contributed work, participating in the magazine's new movement to create high-quality, beautiful and emotional children's verses and songs, called dà Âyà Â.
Three years later he published a collection of verses for children named Shinjushima (, "Pearl Island"), which included the poem , which Kosaku Yamada set to music in 1927. In 1989, "Akatombo" was voted Japan's favorite song in a survey by the NHK show "Japanese Songs, Hometown Songs". A large wall-sized monument to the song, with memorial plaques, stands in Miki's home town, Tatsuno.
From 1916 to 1924 Miki worked in Kamiiso, Hokkaido (modern day Hokuto) in a Trappist monastery as a teacher of literature. During this time, he was baptized in 1922 and joined the Catholic faith. His faith is reflected in the essays Shà «dà Âin seikatsu () and Nihon katorikkukyà Âshi (, History of Catholicism in Japan).
In 1927, he was awarded the Holy Sepulchre of Jerusalem by the Vatican. In 1963 he was awarded the Japanese Medal of Honor with a purple ribbon.
On 21 December 1964, Miki was hit by a taxi and taken to hospital with head injuries. He died of a brain haemorrhage eight days later at the age of 75. Kosaku Yamada, who wrote the music to Akatombo, died on the same day one year later. He was awarded the Order of the Sacred Treasure in 1965. Since 1985, his hometown has been hosting a competition for children's songs, giving a prize named after him (, Miki Rofà «-shà Â).