Masuoka is best known to most fans as Sazae-san's Masuo, Soreike! Anpanman's Jam Ojisan, Dragon Ball's Kame Sennin, Cyborg 009's 005, Voltes V's General Oka, and did a lot of narration work in a lot of productions. For tokusatsu fans, he played a lot of monsters of the week for the Super Sentai Series since Himitsu Sentai Goranger, but his most notable role in the franchise was the narrator of Hyakujuu Sentai Gaoranger and the voice of Gao God in said series.
From all of us here, thank you for the memories.
[Source: Anime News Network, Wikipedia (for additional roles)]