Question: how long does it take to get to japan by ship?
Answer: They estimated that if the naval ship's speed is 15 knots, it will take 20 days to reach Japan. But if it increases its speed to 20 knots, the naval ship will reach Tokyo in just 10 days. However, if it is a nuclear-powered navy ship going at the speed of 35 knots, it will only take 5.8 days to reach Japan.