30-Year Construction Veteran Launches Bitcoin-Anchored AI Diagnostic for Japanese Renovation Market
Summary
Toshikatsu Oga, a 30-year construction veteran turned AI engineer, launched HORIZON SHIELD, an AI-powered service that diagnoses renovation and construction quotes for homeowners in Japan. The company anchored its Pre-Transaction Knowledge Anchoring (PTKA) Protocol to Bitcoin Block #949356 via OpenTimestamps to provide independently verifiable, tamper-evident documentation of the system's core logic. The underlying Japan Construction Cost Database (JCCDB v1.2.2) and technical documentation are published open-access on Zenodo and engrXiv. HORIZON SHIELD lists four paid services with set prices and targets information asymmetry between contractors and property owners in the Japanese renovation market. The Horizons Co., Ltd. is based in Hiratsuka, Kanagawa and provides contact and company details for further engagement.