This ocean going tug was a very old tug brought to Guam by the Japanese. It was first found by divers in the late 60's but over the years it was forgotten about. It was found again by Paul Edwards and Pete Peterson in the mid 80's.
This salvage tug apparently was used by the Japanese in World War II to place torpedo nets across the harbor, as well as for general tug duties and salvage work This information came from discussions with a Guamanian ship yard worker that was forced to work for the invaders.
She was sunk in 1944 (at the same time as the Kitzugawa Maru went down) by a direct torpedo bomb hit in the stern. She also shows evidence of severe aircraft strafing.
The wreck is sitting upright near the Tokai Maru. This wreck is rarely visited by divers and was in good condition until a long-liner dropped its anchor on her and caused extensive damage to the superstructure in 1997.
DIVING TIPS: It is highly recommended to do only an unrestricted swim around of the tug. Most of the bridge, engine room boiler, and engine room superstructure are intact. There is a large hole above the main engine rooms that was opened by a local salvage diver, and you can look down and see both of the main engines, the electrical panels, and an air compressor without going inside.
This wreck is a very good wreck for NITROX divers because of the average dive depth between 90-115 ft.
CAUTION: Because of the changing visibility conditions on the wreck, which can be reduced to as little as 10-15 ft, divers should be very familiar with the location of the ascent line to the boat.
Because this is a very old wreck it is deteriorating very fast, any attempt at penetration could collapse any overhead areas, so extreme caution should be taken before considering this.
WARNING: DO NOT enter any shipwreck without the proper training and equipment. Six divers have paid the ultimate price of their lives while diving inside wrecks here on Guam. Do not breathe the air trapped inside the wreck. It can be very toxic! The ship is showing significant signs of ageing and all divers should use extreme caution when penetrating into or under overhangs or passageways.