Showa Kamen Rider Series Phase 2 (昭和仮面ライダーシリーズ第2期 Shōwa Kamen Raidā Shirīzu Dai Ni-Ki) was the second production phase of the Showa Kamen Rider Series, the first era of the Kamen Rider Series. It refers primarily to the second run of the Kamen Rider Series on Japanese TV, starting with Kamen Rider (Skyrider) which was then followed by Kamen Rider Super-1. It also includes Birth of the 10th! Kamen Riders All Together!!, a TV special which failed to restart the Kamen Rider Series on TV a second time. During the two seasons, the character Genjirō Tani remained a constant supporting character in the same way Tobei Tachibana remained one during the first phase of the Showa Kamen Rider Series.