The movie was illogical
1. The protagonist knows Godzilla can spit lasers from its mouth. The problem is that he has never seen Godzilla do that. How did he know it could spit lasers?
2. How on earth can two ships put air cans on Godzilla? The ships pass Godzilla, and then somehow the air cans all attach to Godzilla.
3. Japan's decision not to send a military to stop Godzilla was nonsense: "If we send a military, it will make the USA and USSR nervous." What? They know you are under attack, so why would they oppose Japan's order to stop Godzilla?
4. The protagonist said he couldn't ask the girl to marry him because "My war wasn't over." The reason didn't make any sense.
5. The doctor said ""Fighter planes built without ejection seats." to criticize the government of Japan for not caring about lives, but all fighter planes in WW2 had no ejection seats, it became standard after WW2.