Himitsu Sentai Goranger

Himitsu Sentai GoRanger (秘密戦隊ゴレンジャー Himitsu Sentai Gorenjā, Himitsu Sentai GoRanger), Secret Squadron FiveRanger in English, is a Japanese tokusatsu superhero television series. Goranger was the first in the long-running Super Sentai series of tokusatsu programmes. Himitsu Sentai Goranger was created by Shotaro Ishinomori, and was broadcast on NET from April 5, 1975 to March 26, 1977, with a total of 84 episodes

The narrator of the series was originally Nobuo Tanaka, who was replaced by Toru Ohira. Ohira narrated every Super Sentai series until Kagaku Sentai Dynaman. (Wikipedia)