As a batter, Noguchi had a 31-game hitting streak, a Japanese professional baseball record which stood for 25 years.

Born in Nagoya, Aichi, Noguchi attended Chukyo Shogyo High School and Hosei University (although he dropped out).

[citation needed] Jirō Noguchi's 1942 season was his most impressive one as a pitcher, featuring a record of 40-17 and a 1.19 ERA, with a still-league-record 19 shutouts to go along with 264 strikeouts.

In 1946, Jirō Noguchi had a 31-game hitting streak, a record which stood until 1971 (when it was broken by Tokuji Nagaike).

[citation needed] In 1950, the JBL reorganized into Nippon Professional Baseball (NPB); Noguchi stayed with Hankyu, playing into the 1953 season.

His final notable year as a pitcher was 1950 when he went 15–9, finishing sixth in the Pacific League division in ERA with a 3.16 mark; he also hit .259.

Noguchi retired after the 1953 season, later working as a minor league manager for the Kintetsu Buffaloes, and as a coach for the Hankyu Braves and Mainichi Orions.

He is second all-time in Japanese baseball in career ERA (behind Hideo Fujimoto) and still ranks very high in a number of career pitching records, including victories, complete games, shutouts, walkless complete games, and innings pitched.