Grendizer, Getter Robo G, Great Mazinger: Decisive Battle! The Great Sea Monster
A giant sea monster known as Dragonsaurus has emerged from out of nowhere, terrorizing the depths of the oceans. Great Mazinger, Grendizer and the Getter Robo G team join forces to combat the new threat. But their task becomes more complicated when Dragonsaurus swallows up Boss Borot and makes its…
VPN providers listing exits in Japan
An exit location does not guarantee access to a streaming catalog or title.
Where to Stream
Stream in 1 country
Sorted by distance from 
United States
JP JapanCast, directors & writers
Akira Kamiya
Ryo Nagare
Hiroya Ishimaru
Kôji Kabuto
Keaton Yamada
Hayato Jin
Kei Tomiyama
Daisuke Umon / Duke Fleed
Keiichi Noda
Tetsuya Tsurugi
Joji Yanami
Dr. Umon / Professor Yumi
Rihoko Yoshida
Michiru Saotome
Hiroshi Otake
Boss
Kosei Tomita
Dr. Saotome
Masayuki Akehi
Director
Go Nagai
Writer
Susumu Takaku
Writer
About streaming Grendizer, Getter Robo G, Great Mazinger: Decisive Battle! The Great Sea Monster worldwide
Our listings show subscription, free or ad-supported streaming for Grendizer, Getter Robo G, Great Mazinger: Decisive Battle! The Great Sea Monster in one country. Check the country guide for providers and access requirements.
Our current listings do not include subscription, free or ad-supported streaming for Grendizer, Getter Robo G, Great Mazinger: Decisive Battle! The Great Sea Monster in United States. This does not confirm that the title is unavailable from every service.
Our listings also show streaming in 1 other country, including Japan. Follow the country guides below to compare providers.
Automatically summarized from TMDB watch-provider listings supplied by JustWatch. Listings fetched . Streaming availability can change. Rental and purchase offers are not included.