Shigeru Koshiba is a Japanese manga artist whose career emerged in the mid-1980s, with his most recognized work being the series Shibai Taroka. His professional activity is primarily documented through his manga publications, which spanned from the late 1980s through the early 2000s.

Koshiba made his mark within the manga industry by contributing to various youth-oriented and young men's magazines. Among his earlier works were series such as Lady Knights, serialized in Shonen King magazine around 1985, and Peach Team Legend, which appeared in the same publication from 1986 to 1987. He also created Dokachin Kid, which ran in Weekly Shonen Sunday in 1988. These works, along with others like The Ring or the Gong and Pikaichi, helped establish him as a creator of action and school comedy genres during that period.

His most prominent work, Shibai Taroka, also known as Shibaitaroka, was serialized in the magazine Young Champion from 1993 to 2000, spanning 20 volumes. The series centers on Yakuda Daigo, a high school student whose intimidating appearance leads everyone to believe he is a violent delinquent, despite his true nature being gentle, caring, and interested in cooking and crafts. This manga served as the original work for an anime adaptation. In the mid-1990s, Shibai Taroka was adapted into a video animation miniseries, with Koshiba credited for the screenplay.

As a creator, Koshiba was known for developing original manga series that blended action with comedy, often serialized in publications aimed at a young male demographic. The central concept of Shibai Taroka, which plays on the contrast between a character’s outward appearance and their true personality, represents a recurring element in his storytelling. His industry significance lies in his consistent output of serialized works for major manga publications during the late 1980s and 1990s, culminating in a long-running series that received an anime adaptation.