# B\-Prost > Core insurance system solutions for Japanese P&C and life insurance carriers ## At a glance | Field | Value | | --- | --- | | Category | Core Administration | | Type | Solutions Provider | | Region | APAC | | Headquarters | Tokyo, Japan | | Founded | 2003 | | Stage | Established | | Employees | 11-50 | | Funding | Acquired | ## Overview B-Prost is a core insurance system solutions provider for property and casualty (P&C), life insurance, and mutual aid (kyosai) companies in Japan. Founded in December 2003, the company focuses exclusively on the insurance industry, combining insurance domain expertise with systems engineering to develop, implement, and maintain policy administration and related core systems for Japanese carriers, small-amount short-term insurance providers, and related organizations. The company offers two principal software frameworks: BIMs, a next-generation insurance system framework built on a service-oriented, microservices architecture with a NoSQL document database and integrated business rules engine; and BIMsEC, a cloud subscription platform for insurance e-commerce and online policy administration. Its proprietary BEXT Engine allows business professionals to define rate calculation, underwriting checks, and data transformation logic using Excel-based syntax rather than traditional programming, reducing system change cycles for insurers. B-Prost holds ISO 27001 (ISMS) and Privacy Mark (P-Mark) certifications. The platform supports both on-premises and SaaS/cloud deployments and covers the full insurance lifecycle from policy underwriting and claims handling to agent management and BI analytics. Over more than 20 years, B-Prost has completed over 200 insurance and mutual aid projects. In May 2026, it became a subsidiary of Nippon Steel Solutions Corporation (NSSOL), with the acquisition targeting AI-enabled modernization of non-life insurance core systems. Prior to that, B-Prost entered a capital partnership with NTT Data Intramart in December 2021 and jointly offered the BIMs framework for APAC markets beginning in April 2022. ## Products & services ### BIMs \(Insurance System Framework\) A next-generation insurance system framework introduced in January 2021. BIMs uses service-oriented architecture with microservices, a document-structured NoSQL database, and an integrated business rules management engine (BEXT) to accelerate insurance digital transformation. It supports multi-channel sales and policy administration, and covers customer management, policy underwriting, claims handling, payment processing, broker and agent management, and BI analytics. The framework is built on NTT Data Intramart's intra-mart Digital Process Automation Platform and was made available for APAC markets jointly with NTT Data Intramart from April 2022. **Key features:** - Flexible product configuration via NoSQL document database - Integrated BEXT business rules engine for rapid rule deployment - Real\-time regional disaster impact analysis in claims handling - Multi\-channel support for in\-person and web\-based sales - On\-premises and cloud/SaaS deployment options *Target users:* P&C carriers, life insurance carriers, small\-amount short\-term insurance providers ### BIMsEC \(Insurance E\-Commerce Platform\) A cloud subscription service launched in March 2021 that enables insurance carriers and small-amount short-term insurance providers to operate online sales channels and policy maintenance portals. **Key features:** - Online policy sales and issuance - Policy maintenance portals for policyholders - Subscription\-based cloud delivery *Target users:* Carriers, small\-amount short\-term insurance providers ### BEXT Engine A proprietary business rules and development platform that uses Excel function syntax as the development interface, allowing business experts -- not only engineers -- to create, test, and maintain rate calculation logic, underwriting checks, and data transformation rules. Rules are deployed as Script files via SOAP API and run without .NET Framework dependencies, supporting Linux and non-Windows environments. **Key features:** - Excel\-based syntax for business rule authoring - SOAP API deployment for rate calculation and underwriting checks - Linux and non\-Windows compatible - Documented delivery in 1\-6 months per module *Target users:* Carriers, insurance agencies ### BasD \(Accident Diagram Tool\) An accident diagram creation tool used in claims handling workflows. *Target users:* P&C claims teams ### System Development and Consulting Services Full project lifecycle services including system planning and consulting, system design and development, product customization, and ongoing maintenance. B-Prost positions itself as a prime vendor for end-to-end insurance core system projects. *Target users:* Insurance carriers, mutual aid organizations ## Category & focus - Subcategories: Policy Administration, Business Rules Management, Insurance E\-Commerce - Insurance verticals: P&C Personal, P&C Commercial, Life & Annuity - Target customers: Carriers ## Notable customers - Daido Fire & Casualty WiL Micro Insurance \(BIMs adoption\) - Insurance carriers and small\-amount short\-term insurance providers \(kyosai\) - Insurance agencies \(BEXT Engine rate and underwriting portals\) ## Links - Website: - Directory profile: - News: - Careers: - Company info: - Products \- bext: - Products \- bims: --- *Last updated: 2026\-06\-25*