The battle sequence which comprises almost half of the movie is breathtaking, it can't be better than that, no one in Hollywood can claim that he or she can create something better however the movie suffered from some facts.

1. A battle group travels in time for unknown reason. I can buy that. You can give the audience every possible "Make sense" fact for the time travel but at the end, time travel is still considered a myth and no one knows if it's even possible, some argue it's not as we had no visitors from the future in the known well documented history so not giving the audience any fact for time travel is not really a problem. It just happened. It's OK.

2.Iba suppressed the mutiny and regained control of the patrol boat. Then he made the most ridiculous and insane move. He blew the boat. Even if he had no use for the boat, he had to keep so he can use the diesel in the tank and tucks, yet he blew the boat with all the fuel and I assume with everything inside it including the ammo.

3. It is a known fact that tanks are short range vehicles. You can't just marsh half of the country with a tank in single tank of fuel. It is just impossible. In the beginning we see that they just march with the tank back and forth (wasting the fuel) and then marching with the tank to the battle. Even by 1940s standard, that was just ridiculous.

4. Same thing goes with the helicopter. Helicopters do not fly on nuclear fuel, they run on gas and they are not a regional passenger jet. Again we see that he flies the copter just to show off like there is no future.

5. They waste ammo just to show off!

6. Iba marches with the entire battle group without protecting his rear. Japan is not a big country. He had to save the patrol boat for escape and if he wanted march, he had to do it along the coast line so at least he had protected back. Coming from the future, he had the precise map of Japan's coast line so he could find a strategic peninsula, secured from 3 sides with water and gun boat and entrench on the land connection, try to lure the enemy to his position. Of course if they wanted to play it right, they had to re wright the whole screenplay but considering the insane effort they put into creating such awesome battle sequence, it was worth it. This movie had the potential of being a cinematic epic/classic.

7. So he marches inland with his battle group which in reality suffered from shortage of ammo an fuel with absolutely no supply line. They got encircled and... It was very well made. They lost everything. Historically such thing happened in WWII when Germans sneaked into soviet line to Stalingrad and everyone knows the outcome. No army commander sneaks into enemy line without having a solid and well protected supply line unless he is on suicide mission!

So, aside from some entertainment factor, the movie was a total disaster.

Soundtrack was good except for the fact that the Japanese singer was singing the mix of English and Japanese... Whenever I heard a song, I wanted to hit my head to the wall.

Overall the concept was good, we saw the concept in several western movies like the "Timeline" and I bet we will continue to see more movies based on similar concept in the future. I would say 6/10. The production was so good that I can not downgrade the movie as much as I like.