About 30 passengers were injured Saturday by broken glass after high waves hit a hydrofoil in Sagami Bay, the Japan Coast Guard said.

They sustained cuts to the face, legs and other parts of their bodies after some sheets of window glass broke when the 279-ton Seven Island Ai hit the surface due to high waves at around 5 p.m. about 15 km off Miura, Kanagawa Prefecture.

Seawater poured into the ship, causing panic among some of the 207 passengers.

"Water came over our heads and soaked up to our knees," a woman said.

A man from Yokohama said people in the front seats were covered with blood after suffering cuts to their faces and arms.

The vessel operated by Tokai Kisen Co. was on its way to Tokyo from Oshima Island.

It later entered Kurihama port in Yokosuka, Kanagawa Prefecture, where the injured people were taken to hospitals.

The Meteorological Agency had issued a warning for strong winds in the area.