Gunma-chan, Uncle Akio, Aoma, and Meemi visit Gunma's kofun site and wander into an alternate world beneath Gunma in the Season 2 finale.
Hello, I'm the Great Black 
Haniwa of the Dark Continent.
Guten Tag.
Enchanté,
Ciao,
Olá. Eu sou o Grande Haniwa Negro
do Continente da Escuridão.
Привет, я владыка тьмы Чёрный Ханива.