Kosugi Tengai was the penname of a novelist in Meiji, Taish and Shwa period Japan. His real name was Kosugi Tamez. He is considered the founder of the naturalism movement in modern Japanese literature.
Kosugi was born in what is now Misato, Akita Prefecture. He moved to Tokyo in 1886 to attend the English Law College the forerunner of Chuo University, but soon dropped out to devote himself to writing fulltime. The start of his career was hardly auspicious. When he brought a sample of his writing to Mori gai, he was encouraged to look for another profession. Undeterred, he visited Ozaki Ky, who confided to Izumi Kyka that Kosugi would never realize his ambition to become a novelist. However, in 1890, Kosugi became a disciple of literary critic and satirical author Sait Ryokuu, and began writing political novels under Saits direction.
Source: Wikipedia