Sea Crossing Festival is held on the last weekend of July at Aoshima Shrine on Aoshima Island (Miyazaki City, Miyazaki Prefecture), a small island with a circumference of 1.5 km.

In the festival, the enshrined deities of Hikohohodemi no Mikoto, Toyotamahime no Mikoto and to Shiotsutsu no Ookami are placed on a portable shrine and brought to the legendary palace in the sea. Young men aged from 22 to 23 rush into the sea, trying to take the portable shrines off the boats and carry them back to the land.

On the first day of the festival, the parade drops in at 15 places on the island first, then the portable shrine is placed on a boat called Goza-bune and it cruises around the island accompanied by many fishing boats decked with Tairyo-bata flags that traditionally indicate a big catch, and the portable shrine is finally brought back to the island to be placed at Tenmangu Shrine during the night.

On the second day, after dropping in at 11 places on the island, the young men again start to shake the portable shrine violently and make attacks on the carriers. After the rampage and rest are repeated for some hours, the portable shrine returns to Aoshima Shrine at last. This is a highly spirited and energetic festival, the origin of which is too old to be identified.