Kōzō Arimori

Kōzō Arimori (有森 浩三) is a Japanese professional shogi player ranked 8-dan.

Early life, amateur shogi and apprenticeship
Arimori was born in Okayama, Okayama Prefecture on February 13, 1963. As a junior high school student he won the 2nd Junior High School Student Meijin Tournament in 1977, and that same year was accepted into the Japan Shogi Association's apprentice school at the rank of apprentice professional 5-kyū under the tutelage of shogi professional Michio Ariyoshi. Arimori obtained the rank of apprentice professional 1-dan in 1979 and was awarded full professional status and the rank of 4-dan in March 1983.

Shogi professional
In March 2007, Arimori declared his intention to the Japan Shogi Association to become a Free Class player as of April 2007.

Promotion history
The promotion history for Arimori is as follows:
 * 5-kyū: 1977
 * 1-dan: 1979
 * 4-dan: March 9, 1983
 * 5-dan: August 26, 1986
 * 6-dan: July 13, 1991
 * 7-dan: September 7, 2000
 * 8-dan: April 1, 2022

Awards and honors
Arimori received the JSA's "25 Years Service Award" in 2011 in recognition of being an active professional for twenty-five years.