During the Mongolian invasions of Japan, what were the Mongol boats mostly stopped by?

During the Mongolian invasions of Japan, the Mongol boats were mostly stopped by typhoons. Typhoons, or powerful tropical cyclones, played a significant role in disrupting and destroying the Mongol fleet as they attempted to invade Japan in the 13th century. These typhoons, known as kamikaze or "divine winds," proved to be a natural barrier against the invaders as they caused immense damage to the Mongol ships and prevented their progress, ultimately compelling them to retreat. The typhoons served as a crucial defense mechanism for Japan, protecting the country from foreign invasions and cementing their reputation as unconquerable by outside forces during this time.