In November 1970 he received a stern warning from the Central League president due to "involvement with persons in baseball gambling."

While playing with the Hiroshima Toyo Carp in 1979, Enatsu was the Central League MVP, as he compiled a 9–5 record with a 2.67 ERA and 117 strikeouts in 104-2/3 innings.

Enatsu joined the Milwaukee Brewers for spring training in 1985 at age 36 in an attempt to play Major League Baseball.

Enatsu finished spring training with a 4.91 ERA in 11 innings and was among the team's final cuts before the season.

[3] Enatsu is a major shadow-figure in Yōko Ogawa's novel The Housekeeper and the Professor (Hakase no ai shita sūshiki, 博士の愛した数式, 2003).