Sentinel Space Alliance provides strategic advisory services to organizations in the space and defense sectors. Leveraging deep expertise in national security, we support partners in Japan and around the world across the entire process—from the development of actionable strategies to their effective execution.
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Taro Sato
President
Taro Sato has been at the forefront of Japan’s national security and space policy for years. With experience spanning the Ministry of Defense, the Cabinet Office, and leading U.S. think tanks, he played a central role in shaping Japan’s first governmental space security strategy—the Space Security Initiative, the nation’s inaugural strategic framework dedicated to space security. A key architect of national policy and strategy in this domain, his leadership continues to drive forward Japan’s strategic direction in space and defense.
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Hidetoshi Tamura
Director, Defense Business
Hidetoshi Tamura is a seasoned defense expert whose career spans frontline command in the Japan Air Self-Defense Force and strategic policy planning at the Ministry of Defense. He has led multi-agency initiatives to enhance Japan’s standoff defense posture and integrated air and missile defense capabilities. Bridging the worlds of policy and operations, Tamura brings decisive leadership and mission-driven insight to every client engagement.
With national security and defense policy at our core, we provide integrated support from strategy development to intelligence analysis.
We are a trusted partner committed to helping clients make confident, informed decisions.
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Project Planning
Compelling value propositions are developed by identifying and structuring key issues within the context of policy, regulatory frameworks, and operational requirements. Support spans from proposal development to institutional system design—ensuring alignment with stakeholder needs and strategic objectives.
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Intelligence & Analysis
Strategic environment assessments and in-depth intelligence analysis support informed decision-making in defense and security contexts. Services include adversary capability assessments, emerging technology evaluations, and horizon scanning to anticipate future threats and opportunities.
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