Also known as: 黄金戦士ゴールド・ライタン
Golden Warrior Gold Lightan, 1981 Mecha anime series by Tatsunoko.
The story is about a young boy named Hiro Taikai who finds a gold Lighter which turns out to be the giant Golden Warrior Gold Lightan, who has the mission to save the Earth from an invasion by King Ibalda.