Hosai Ozaki (now part of the city of Tottori ) born on January 20, 1885 in Yoshikata, County Ōmi, Tottori Prefecture, the second son of the court clerk Ozaki Nobuzō (尾崎 信 三). In the years after his birth the family ( such as the county Ōmi now part of the city of Tottori ) moved to Tachikawa, County Homi.
1899, aged about 14 years, Hosai began to write haiku. In 1902 he completed the first middle school of Tottori Prefecture and joined the Department of Literature of the First High School. In 1905 he became a student at the Imperial University of Tōkyō. In the same year he made Sawa Yoshie (沢 芳 卫), who was his cousin, a marriage proposal, was forced to resign because of the family relationship of this however.
In 1909 he completed his studies at the Faculty of Political Science and worked for a news agency. However, the employment relationship did not last long.
In 1911 he began to work in the contract department of the Toyo - life insurance AG. In 1913 he became head of this department and in 1914 became deputy head of the branch in Osaka, but returned in 1915 to his old place in Tōkyō back and contributed to the magazine Soun, which was dedicated to the detached from the traditional form, new haiku.
In 1921 he was dismissed as head of the contracts department and resigned from his job at the Toyo - life insurance AG at the end of the year altogether.
In 1922 he went as head of the newly formed Korean fire and marine insurance to Korea. In 1923, he again began to write articles for the Koun, but lost his job again and then went to Manchuria, where he had to be treated for pleurisy, which worsened unexpectedly in hospital. He dictated Muryōjubutsu (无量 寿 佛, GV " The Buddha of immeasurable long life," Amitabha ) and went in the same year to the Community Ittōen.
In March 1924 he became temple servants in the Chion-in and moved in June to the temple Fukushō -ji in the district Suma, Kobe. In May 1925, he was then in the temple servants Joko -ji in Obama, Fukui Prefecture, left the temple but again in July in order to go to the Saiko -ji on the island of Shodo, where he died on 7 April 1926.