Tekkan Yosano (与謝野 鉄幹 , Yosano Tekkan, February 26, 1873 - March 26, 1935) was the pen-name of Yosano Hiroshi, a Japanese author and poet active in late Meiji, Taishō and early Shōwa period Japan. His wife was fellow author Yosano Akiko. Kaoru Yosano, cabinet minister and politician is his grandson.
Yosano was born in Kyoto as the son of Buddhist priest, and was a graduate of Keio University. After graduation, he taught Japanese language for four years at Tokuyama Girls' School, in what is now Shunan city, Yamaguchi prefecture. He was forced to quit over alleged improprieties with one of his students. At the age of 20, he moved to Tokyo, and as he was always interested in Japanese literature, he became a disciple of Michia Naofumi, a noted poet and scholar of the Japanese language. He supported himself as a staff writer for Tokyo newspapers. On 11 May 1894, he published a strongly worded article encouraging the reform of traditional Japanese poetry, or waka, to give it more originality and thus make it more popular.