Shimatani managed his local club Kyoto Shiko Club (later Kyoto Purple Sanga) in 1972. 1972 season is first season Kyoto Shiko Club was promoted to new division, Japan Soccer League Division 2 from Japanese Regional Leagues. He managed until 1974. In 1977, he managed for Kyoto Shiko Club again. However, in 1978 season, the club was relegated to Regional Leagues. He resigned in 1978. In 1994, he signed with Kyoto Purple Sanga. He resigned in September.
On October 24, 2001, Shimatani died of cirrhosis in Kyoto at the age of 62.