日本気象協会

The Japan Weather Association, also known as 日本気象協会 or JWA, is a weather organization headquartered in Japan. It provides meteorological information and services to the public, which are accessible through its website and mobile application. The organization’s core activities include delivering weather forecasts, alerts, and related data to users across the country. As a weather-focused entity, it supports public awareness and preparedness for atmospheric conditions. Its services are utilized by individuals, businesses, and possibly government agencies seeking timely weather information. The association operates under the broader sector of meteorological services within Japan.

On 1 January 2025, the Japan Weather Association experienced significant service disruptions due to distributed denial-of-service attacks targeting its website and mobile application. The attacks caused outages that exceeded seven hours for the website and nine hours for the mobile app. These incidents were part of a larger campaign that affected at least 46 Japanese entities, including financial institutions and aviation services. The attackers employed malware-infected Internet of Things devices, such as cameras and home appliances, to generate overwhelming traffic. Security analysts identified botnet coordination through compromised IP addresses and observed parallel attack patterns in Western nations. The analysis also noted the possibility that multiple threat actors were operating simultaneously during the campaign.