The 70 meter long, 1730 dwt cement carrier Sumise Maru No. 38 collided with the 52 meter long, 696 dwt chemical tanker Kaisei Maru in the Japan Sea off Hyogo, Japan. The Sumise Maru was proceeding in ballast from Osaka to Ako when it was struck by the Kaisei Maru. The Sumise Maru filled with with water and sank 3 hours later. One crewman on each vessel was injured in the collision. The Kaisei Maru was able to proceed under its own power to Himeji. The tanker was carrying 1000 tons of methanol from Osaki-Kamijima to Himeji.