Market Context — Why This Technology, Why Now

Growing global regulatory scrutiny and consumer demand for transparent food supply chains are driving the need for advanced contaminant detection. Companies face pressure to ensure product safety, especially for environmental radionuclides, to maintain brand reputation and market access. This technology provides a critical tool for proactive risk management, enabling producers and processors to meet stringent international standards and build consumer confidence in an increasingly complex global food market.

Key Competitive Advantages
01

Enables stable measurement by eliminating errors from soil potassium fluctuations

02

Simplifies sampling and analysis processes by efficiently adsorbing cesium with specialized sheets

03

Provides reliable data by accurately estimating crop cesium content using a unique calibration curve

Market Opportunity
Agricultural Corporations & Producers
$300M–$400M globally (AI est.)
Proving agricultural product safety directly enhances brand value. This technology supports sustainable farm management by reducing inspection costs and improving reliability.
Large-scale agribusinesses Organic and specialty crop producers Agricultural cooperatives
Food Manufacturers & Distribution
$400M–$500M globally (AI est.)
Strengthens safety management across the entire supply chain, ensuring consumer trust. It also facilitates compliance with international food safety standards.
Major food processing corporations International food distributors Private label food brands
Environmental Testing Institutions
$150M–$250M globally (AI est.)
Efficient and high-precision testing solutions contribute to reduced workload and improved service quality. It also enables the development of new testing services.
National environmental agencies Private environmental testing labs Research institutions focused on contamination
IP Defensibility — Why Competitors Can't Replicate This
What This Patent Covers

This patent protects a method for estimating radioactive cesium in crops using copper-substituted Prussian blue sheets and a specific calibration curve, independent of soil potassium. The claims were robustly established through a detailed prosecution process, overcoming seven cited prior art documents and demonstrating clear inventiveness, resulting in a strong, difficult-to-invalidate right.

Competitive White Space

This patent primarily covers sheet-based cesium estimation in crops. White space exists for developing real-time, in-situ detection systems without physical sheets, or expanding to other radionuclides and integrating with advanced IoT and AI for predictive contamination modeling.

Economic Impact
~$550K/year estimated inspection cost efficiency per facility (est.)
estimated ROI · USD · AI analysis
ROI Calculation Logic

For 2,000 crop sample inspections annually, conventional analysis costs ~$335/sample (AI est.). This technology could reduce costs to ~$65/sample (AI est.) for sheet installation, collection, and simple measurement. This projects an annual cost efficiency of (~$335 - ~$65) × 2,000 samples = ~$540K/year (AI est.). This efficiency could enhance inspection capabilities, strengthen quality assurance, and boost brand value.

Speed to Market
7× faster than in-house development
This technology is built upon an established cesium adsorption mechanism using copper-substituted Prussian blue sheets, with clear data acquisition methods for calibration curve creation. The patent details specific sheet embedding, measurement, and estimation processes, indicating a strong technical foundation. This significantly shortens the proof-of-concept and basic research phases compared to developing similar technology from scratch, enabling rapid commercialization for licensees.
Competitive Positioning

X: Measurement Accuracy and Stability
Y: Ease of Field Implementation

Business Models & Applications
🌿 Cesium Adsorption Sheet Sales
This model involves directly selling the core copper-substituted Prussian blue sheets to agricultural corporations and testing institutions, securing a continuous revenue stream.
🔬 Analysis Service Provision
Offer analysis services to testing institutions and agricultural organizations, covering dissolved cesium measurement after sheet retrieval and crop cesium estimation using the calibration curve.
🤝 Technology Licensing
License the technology's measurement methods and calibration curve expertise to partner companies in specific regions or industries to accelerate its adoption.
Adjacent Application Opportunities
💧 Water Contamination Monitoring
Simplified Cesium Contamination Detection in Water Bodies
By deploying sheets not only in soil but also in riverbeds or water bodies, this technology could enable simple and continuous monitoring of radioactive cesium contamination in aquatic systems. This contributes to broad water quality management and strengthens environmental protection efforts.
🏭 Industrial Waste Management
Cesium Concentration Management in Incineration Ash
This technology could be applied to estimate cesium concentrations in industrial waste, particularly incineration ash, in near real-time. This enhances the safety of treatment processes and efficiently facilitates proper waste management.
🏘️ Decontamination Projects
Rapid Evaluation of Decontamination Effectiveness
By embedding sheets in soil within decontaminated areas and measuring changes in dissolved cesium, this could serve as a tool for rapid and objective evaluation of decontamination effectiveness. This could lead to operational efficiencies and increased public confidence.
Integration Roadmap — Estimated 15-Month Deployment
Technology Evaluation & Prototype Development
Duration: 3 months
Conduct foundational evaluation to adapt the sheet material and calibration curve logic to the licensee's existing systems and crop types. This phase involves acquiring initial data through small-scale pilot tests and developing a prototype.
Field Validation & System Integration
Duration: 6 months
Validate the developed prototype on a larger scale in actual agricultural fields or testing facilities. Establish integration with existing agricultural management systems and data analytics platforms, identifying and resolving operational challenges to prepare for practical deployment.
Full-Scale Deployment & Business Expansion
Duration: 6 months
Based on insights from field validation, fully deploy the technology and initiate business expansion. This phase accelerates market penetration through establishing mass production for sheets, offering analysis services, or solidifying a licensing model.
Technical Feasibility
This technology comprises simple steps: embedding and retrieving copper-substituted Prussian blue sheets, then measuring adsorbed cesium. Patent claims specify sheet materials and calibration curve methods, suggesting high compatibility with existing agricultural machinery and soil testing equipment. It requires minimal capital investment, lowering adoption barriers in agricultural settings. Integration into current soil sampling and analysis processes is straightforward, enabling rapid deployment.
Success Scenario
Upon adoption, licensees could accurately and stably estimate radioactive cesium in agricultural products, independent of soil potassium levels. This is estimated to streamline inspection costs by hundreds of thousands of dollars annually, fundamentally strengthening quality control from production to shipment. Consequently, it could enhance consumer trust, boost brand value, and significantly improve compliance with international food safety standards.
Patent Record
APPLICATION NO.
特願2021-009433
REGISTRATION NO.
7250365
FILING DATE
2021/01/25
GRANT DATE
2023/03/24
EXPIRATION DATE
2041/01/25
PATENT HOLDER
国立研究開発法人農業・食品産業技術総合研究機構
Examination History
2021年11月29日
出願審査請求書
2022年11月22日
拒絶理由通知書
2022年12月26日
意見書
2022年12月26日
手続補正書（自発・内容）
2023年03月07日
特許査定