Overall one's reaction to this film will rely on how interested they are in geology and plate tectonics. There are several points in this film where it grinds to a halt and we are "treated" to a lecture about how the earth's crust and mantle work and why the destruction of Japan is so imminent. While ostensibly quite boring, this actually perked up my attention as the whole scenario seems quite plausible. Japan is in fact in a precarious geologic position and could indeed one day (albeit over the course of millions of years) fall away into the Japan Trench.This movie asks you to accept a huge what-if scenario for if continental drift could suddenly accelerate to cataclysmic rates. Fortunately this film also does a pretty good attempt to simulate this, relying heavily on Teruyoshi Nakano's brilliant pyrotechnic effects.The real show-stopper comes about 40 minutes into the film with the out-of-nowhere 15-minute earthquake that strikes Tokyo and kills over 3 million people. What a bodycount! I think it had to be the largest in any film up to that point. Lots of quality shots of oil refineries exploding, cars crashing, people running around on fire, and even some surprisingly graphic gore when glass shards rain down on civilians. This sequence (along with the film in general) is aided immeasurably by one of Tetsuro Tamba's best performances ever as the stoic, yet prone-to-outburst prime minister.Unfortunately this mid-movie sequence is the high point of the film. The climax is clumsily structured and not very exciting at all, instead deciding to focus on two married evacuees being separated. Quite disappointing. At least the film maintains a level of earnest seriousness which can draw you in even though there is little or no character development... much like VIRUS did seven years later. Also it asks some good questions such as whether a nation deserves to exist when the land underneath it ceases to be... or what human life (when we're not talking about a few, but 100 MILLION) is really worth.Overall though, this film is a bit talky and poorly structured, but personally I was quite intrigued and not bored... and the mid-movie destruction and mayhem (as only the Japanese can deliver) was well-worth the price of admission. Also, refreshingly for Toho films of the time, there are no annoying children and no attempts at humor. Zero.

This is the original film adaptation to the popular science fiction novel by Komatsu Sakyo, Nihon Chinbotsu. The scale of the disaster and the uniqueness of the implications has never before been matched by any film (except for probably the remake). Here's why: Nihon Chinbotsu is very simply about Japan Sinking in to the ocean. With great eruptions of volcanos and tremendous earthquakes, the homeland of the Japanese will completely disappear along with their factories, landscapes, cherry blossoms, cultural artifacts, and the homes and lives of millions. And none of these things can be rebuilt. The Japanese do not rise out of the ashes with a will to reconstruct their nation, the Japanese do not find hope in the rubble, there is nothing. The homeland is lost forever and the Japanese will have to live amongst people they have no ties with, in a culture foreign and a language unknown, amongst hatred with the label a refugee forever.You can clearly see that this movie is not the traditional disaster flick. If you just want to see exciting heroics and special effects, this movie will not deliver. It's an old film and from 21st century standards, the visible strings and cheesy explosions cannot satisfy. But the movie makes up for it in substance. The story, the characters, the despair, is all believable. The questions raised like, are the Japanese worth saving once they've lost all their economic power? And because the story takes place in Japan, of course the people also begin to consider dying with their homes.It's definitely a must watch especially if you've seen the recent remake or don't have time to read the book. If you're Japanese, take the extra moment to think about what you would do in this situation and this movie will leave a lasting impression on your mind.

Back in 1973, I have the opportunity to see this film in a lush big screen and back them that was an impressive show. Of course, anyone that has grown up in today's computer animated hyper realistic effects will dissect the movie mercilessly. In the other hand, we have here a film that depicts an event that 35 years later will make a good docudrama in the Discovery Channel. This drama described with precision a nation loosing his homeland to a great cataclysm that literally erase Japan out of the map, dispersing the surviving population around the globe separating families and friends to eventually live at the mercy of surrogate countries. I will love to see this film made again with today's f/x technology. Japanese filmmakers have matured well enough to create one the most shocking films ever.

This film is very rarely shown. As one of the biggest fans of the disaster movie genre, I can honestly say that the film is a disappointment. The Japanese version of this film was excellent from what I understand, but the American version that I saw was terrible. Lorne Green was dubbed in for American audiences in 1975 and the movie was retitled Tidal Wave. I believe 1973 is listed on IMD's records. I think you may be incorrect. I have always seen the movie date as 1975 everywhere else. The special effects are worth seeing as some of the acting, but again very disappointing as far as the tidal wave sequences. It is worth watching once if the networks ever air it again. This picture is very rare and almost forgotten.