Japan and Korea would never go to war, but Hyunmoo-5 is in Tokyo

They would declare surrender immediately if even a single shot were fired.
The reason not only Japan but also China cannot mess with Korea is because of the Hyunmoo missiles.
If the Hyunmoo-5 hits a few strategic locations, it wouldn't take long for them to revert to the Stone Age.
Even though Iran fired so many missiles, they didn't have anything like the Hyunmoo missiles, which is why Israel was able to conduct the war so easily.