Where to watch
The Viper Brothers: 18 Extortion Threats isn't on any streaming service in India right now, but it's available in Japan. Streaming rights are licensed per country.
Cast · Directed by Sadao Nakajima
More from Bunta Sugawara · Lead actor
More from Tsunehiko Watase · Co-star actor
More from Sadao Nakajima · Director
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The Viper Brothers: 18 Extortion Threats — streaming FAQ
Which OTT platform streams The Viper Brothers: 18 Extortion Threats?
The Viper Brothers: 18 Extortion Threats isn't on any streaming service in India yet, but it's available in Japan. Streaming rights differ by country — switch your country in the header to see where.
Is The Viper Brothers: 18 Extortion Threats on Netflix?
No, The Viper Brothers: 18 Extortion Threats is not on Netflix in India as of September 2026.
Is The Viper Brothers: 18 Extortion Threats on Amazon Prime Video?
No, The Viper Brothers: 18 Extortion Threats isn't on Amazon Prime Video in India right now.
Where can I watch The Viper Brothers: 18 Extortion Threats for free?
The Viper Brothers: 18 Extortion Threats isn't streaming in India yet, so there's no way to watch it free at the moment.
Is there a sequel to The Viper Brothers: 18 Extortion Threats?
Yes — The Viper Brothers: 18 Extortion Threats is followed by The Viper Brothers: Four and a Half Years in Jail (1973) in the Viper Brothers Collection.
Is there a prequel to The Viper Brothers: 18 Extortion Threats?
Yes — The Viper Brothers: Prison Gang 13 (1972) comes before The Viper Brothers: 18 Extortion Threats in the Viper Brothers Collection.
Is The Viper Brothers: 18 Extortion Threats part of a trilogy?
No — The Viper Brothers: 18 Extortion Threats is part of the Viper Brothers Collection, which has 8 films.
How many movies are in the Viper Brothers Collection?
There are 8 films in the Viper Brothers Collection: The Viper Brothers (1971), The Viper Brothers Rage Again (1971), The Viper Brothers: Prison Gang 13 (1972), The Viper Brothers: 18 Extortion Threats (1972), The Viper Brothers: Four and a Half Years in Jail (1973), The Viper Brothers: The Blackmailers (1973), The Viper Brothers: Up on 30 Charges (1974) and The Viper Brothers and the Young General (1975).
