Claim: The Monthly Shōnen Rival, a Japanese monthly shōnen manga magazine by Kodansha) released several series such as Aoi-sama ga Ikasete Ageru by Kiki Suihei and Blazer Drive by Seishi Kishimoto.
Evidence: Monthly Shōnen Rival (Japanese: 月刊少年ライバル, Hepburn: Gekkan Shounen Raibaru) was a Japanese monthly shōnen manga magazine by Kodansha that ran from April 4, 2008 to June 4, 2014. Aoi-sama ga Ikasete Ageru
葵さまがイかせてアゲル Kiki Suihei Blazer Drive
ブレイザードライブ (Bureizā Doraibu) Seishi Kishimoto