Sumiwa Koun Co.

Sumiwa Koun Co., also known as Sumiwa Koun Co., is a port transport operator headquartered in Japan. The company provides logistics services that facilitate the movement of cargo within and between Japanese ports. Its activities include the loading, unloading, short‑term storage, and inland transportation of goods for shipping lines, importers, and exporters. By operating at the interface between sea and land transport, it supports the flow of domestic and international trade through Japan’s maritime gateways.

The organisation’s distinguishing attribute is its specialisation in port‑side transport operations, as explicitly noted in public reporting of a cyber incident. This focus places it within the broader logistics and transportation sector, where it contributes to the efficiency of supply chains that rely on timely cargo handling. No further details about its market share, regulatory role, or parent‑company relationships are disclosed in the available sources.

On June 4, 2022, Sumiwa Koun Co. experienced a ransomware attack that compromised its business server, an event discovered when an employee reported connectivity problems. The affected server was isolated from the network, and the company engaged an external vendor to conduct a forensic investigation while also notifying the police and the Personal Information Protection Commission. Although server damage was confirmed, the sources indicate that it remains uncertain whether any data was exfiltrated during the breach.

No explicit information regarding the company’s size, ownership structure, subsidiary relationships, or annual revenue is provided in the supplied material, so those aspects are not described here. The profile therefore remains limited to the confirmed facts about its core activity, sector positioning, and the reported cybersecurity incident.