Open House Group is Japan's fastest-growing real estate company, with over ¥1 trillion in revenue, multiple subsidiaries, 300+ locations, and 14 group companies. The rapid growth created a complex, expanding attack surface that was difficult to monitor and secure.
The challenge: With dozens of subsidiaries and hundreds of locations, the attack surface was constantly growing. New systems and services were being deployed regularly, and the security team needed visibility across all group companies — not just the parent organization.
An early discovery: Within days of onboarding ULTRA RED, the platform identified a test environment that had been set up for development purposes and was externally accessible. The environment had not been intended for public exposure, and the security team was unaware it was reachable from the internet. This type of shadow IT exposure is common in rapidly growing organizations.
Why Open House Group chose ULTRA RED: The security team specifically selected ULTRA RED for its validation-first approach. They needed confidence that findings were real — not a list of theoretical vulnerabilities requiring hours of manual verification.
Ongoing capabilities
Continuous monitoring across 300+ locations and 14 group companies
Validation-first scanning ensures only confirmed exploitable findings are surfaced
VITA AI for threat triage and remediation prioritization
Planning to expand coverage to cloud posture and brand protection
The Open House Group case demonstrates how ULTRA RED serves organizations with complex, multi-entity attack surfaces — providing centralized visibility and continuous validation across a rapidly growing digital footprint.
