The amazarashi app is a dedicated platform for fans of the band, specifically designed for the 'Ghost' concert event at Yokohama Arena on April 29, 2025. This free Android application serves as an encrypted communication tool for fans, referred to as 'word zombies,' ensuring secure interactions among them. It emphasizes privacy by prohibiting the use of external channels, creating a unique space for community engagement.

Optimized for devices running Android 12 or higher and requiring a minimum of 4GB RAM, the app is tailored to enhance the concert experience. With its focus on encryption and community, amazarashi offers a specialized environment for fans to connect and share in the excitement of the upcoming event.