"Gegege no Kitaro" was the opening theme for the anime series. It was sung by different artists each year, including Ukadan in the 4th season who released it as a single in 2013

Reni, Masami Hisamoto and Ukadan sang it in the 15th "Sakazaki Kounosuke
no Momoiro Folk Mura" episode in 2015

Mus: Taku Izumi (いずみた), Lyr: Shigeru Mizuki (水木しげる)

TV version:

Kanji

ゲッゲッ ゲゲゲのゲー
朝は寝床で グーグーグー
たのしいな たのしいな
おばけにゃ学校もしけんもなんにもない
ゲッゲッ ゲゲゲのゲー
みんなで歌おう ゲゲゲのゲー

ゲッゲッ ゲゲゲのゲー
昼はのんびり お散歩だ
たのしいな たのしいな
おばけにゃ会社も仕事も なんにもない
ゲッゲッ ゲゲゲのゲー
みんなで歌おう ゲゲゲのゲー

ゲッゲッ ゲゲゲのゲー
夜は墓場で 運動会(うんどうかい)
たのしいな たのしいな
お化けは死なない 病気もなんにもない
ゲッゲッ ゲゲゲのゲー
みんなで歌おう ゲゲゲのゲー
みんなで歌おう ゲゲゲのゲー
みんなで歌おう ゲゲゲのゲー

Romaji

Ge ge gegege no ge *
Asa wa nedoko de guu guu guu
Tanoshii na Tanoshii na
Obake nya gakkou mo shiken mo nannimo nai
Ge ge gegege no ge
Minna de utaou gegege no ge

Ge ge gegege no ge
Hiru wa nonbiri osanpo da
Tanoshii na Tanoshii na
Obake nya kaisha mo shigoto mo nannimo nai
Ge ge gegege no ge
Minna de utaou gegege no ge

Ge ge gegege no ge
Yoru wa hakaba de undoukai
Tanoshii na Tanoshii na
Obake wa shinanai byouki mo nannimo nai
Ge ge gegege no ge
Minna de utaou gegege no ge
Minna de utaou gegege no ge
Minna de utaou gegege no ge

Translation

Ge- Ge- Ge-ge-ge and ge
At morning in the bed, zzz-zzz-zzz
Oh, what fun! Oh, what fun!
Monsters don't have school--and tests, no, not one!
Ge- Ge- Ge-ge-ge and ge
Let's sing, everyone: Ge-ge-ge and ge

Ge- Ge- Ge-ge-ge and ge
At daytime it's a carefree stroll
Oh, what fun! Oh, what fun!
Monsters don't have offices--and jobs, no, not one!
Ge- Ge- Ge-ge-ge and ge
Let's sing, everyone: Ge-ge-ge and ge

Ge- Ge- Ge-ge-ge and ge
At night, we play sports in the graveyard
Oh, what fun! Oh, what fun!
Monsters never die--and sickness, no, not one!
Ge- Ge- Ge-ge-ge and ge
Let's sing, everyone: Ge-ge-ge and ge
Let's sing, everyone: Ge-ge-ge and ge
Let's sing, everyone: Ge-ge-ge and ge