日本気象協会

The Japan Weather Association (JWA)operates as a weather-focused organisation headquartered in Japan, delivering meteorological information and services to users within the country. Its primary channels for disseminating weather data include a publicly accessible website and a mobile application, which together provide forecasts, alerts, and related weather content. As a weather association, JWA’s core mission centres on collecting, analysing, and distributing atmospheric data to support public safety, planning, and awareness. The organisation’s services are designed to reach a broad audience that relies on timely and accurate weather insights for daily activities and decision‑making. Being based in Japan, JWA aligns its operations with the nation’s climatic patterns and regional forecasting needs, contributing to the broader ecosystem of weather information providers in the area.

JWA’s distinguishing attributes stem from its specialization in weather communication through digital platforms, a focus highlighted by the service disruptions it experienced in early 2025. On 1 January 2025, the organisation faced distributed denial‑of‑service attacks that targeted both its website and mobile application, resulting in outages exceeding seven and nine hours respectively. These incidents were part of a larger campaign affecting at least 46 Japanese entities, including financial institutions and aviation services, and involved malware‑infected IoT devices such as cameras and home appliances to generate overwhelming traffic. Security analysts observed that the botnet coordination relied on compromised IP addresses and noted parallel attack patterns occurring in Western nations, suggesting possible simultaneous operations by multiple threat actors. The episode underscored JWA’s reliance on its online infrastructure for service delivery and exposed the vulnerability of weather‑information providers to large‑scale cyber threats. While the organisation’s ownership structure, parent‑subsidiary relationships, or exact workforce size are not detailed in the available sources, its role as a dedicated weather service provider remains evident from its public-facing digital offerings and the nature of the cyber incident it endured.