Long story short: The Tojinbo Cannons (Located at the Tojinbo cliffs, Japan) were built to shoot the moon in half to decrease the rapid acceleration because it was going to hit earth. Bam.
More from the Neo Japan 2202 series:
why does nobody worries about cannons?
they can be killed with 1st gen ballistic rockets developed in same 60th?
big guns died with Dora.
As for the cannons though, they are awesome. And I agree with everyone else: Chinnoks, really?
However, why are you using Chinook helicopters? It does not fit the setting at all, I think you should design some kind of futuristic transport aircraft, looking at your other works, it should look incredible.
Also, Kawasaki has a license to produce them (as variant J), so that places them in Japan with local production.
Great Great Work!!!!!!!!!!!
I am really impressed with feelings Your job is giving.
That`s what I call Proper Sci-Fi!
Its super effective.
Think of this as an exponentially worse scenario of why no scientist suggest blowing up asteroids with nukes unless there is absolutely no other way (And even then its debatable), you destroy one rock, but get many more, which would only work if the smaller ones are small enough to burn in entry.
If not, a rock that could have hit a single city you could have evacuated now is five rocks which impact USA, Russia, China, Europe, and Japan. World Wars have started for much less than that.
Look at the picture's background, you can see the moon, and chunks the size of countries flying away. The guns would likely take out those first, while smaller but still devastating ones get past. To say notihng of the fact those cannons do not seem to be mounted on turrets, so no adjusting angle of shot, nor turning around.
All things considered, Earth was screwed one way or the other. (But its fiction, so we can ignore this type of problems, of course)