Mari Shimizu was born on June 7th in Saitama City, Saitama Prefecture. She's the voice actress for Jetter Mars. She was likely chosen as the voice actress for Mars as she had voiced Astro Boy in the 1963 animated adaptation of the classic manga from Osamu Tezuka.

Gorou Naya was born on November 17, 1929 in Hakodate, Hokkaido, Japan. He unfortunately passed away March 5, 2013.

Yoshiko Matsuo was born on March 5, 1944 in Chuo-ku, Tokyo, Japan. She is a professional voice actress with a number of roles in very popular anime such as Speed Racer. Yoshiko Matsuo's sister, Keiko Matsuo, would occasionally fill in for her during the production of Jetter Mars.

Hisashi Katsuta was born in Negishi, Taito-ku, Tokyo, Japan on April 2, 1927. He would unfortunately pass away February 21, 2020 at age 92.

Fuyumi Shiraishi was born on October 14, 1936 in the Republic of China, Beiping (now Beijing), and she unfortunately passed away March 26, 2019 at age 82.

Mami Koyama was born on January 17, 1955 in Japan, Nishio City, Aichi Prefecture. You may know her for her role as Arale from Dr. Slump and Lunch from Dragon Ball.

Mami Koyama was born on January 17, 1955 in Japan, Nishio City, Aichi Prefecture.

Kosei Tomita was born on February 4, 1936 in Tokyo Prefecture, Japan. He would unfortunately pass away on September 27, 2020 at age 84