One of the harbor transportation incidental businesses, such as plying boats, security, line handling, water supply, cleaning and other affairs specified by MOLIT.

The tying of lines that are lowered from a vessel to a mooring post (bit) to secure the vessel to the wharf when the vessel berths, and the untying of the lines when the vessel leaves.

Operation of small ferry boats plying between a main ship anchored at sea and land, primarily to transport people and documents.

Supplies fuel oil to ships.

Provides ship supplies (food and other items) for ships or crew, or launders crew clothing, etc.