Revolutionizing Professional Services: Launch of Shigyo AI with Unprecedented Accuracy

On May 20, 2026, Prime Partners Consulting Co., Ltd., along with Prime Partners Tax Corporation based in Minato-ku, Tokyo, unveiled the official version of their specialized AI service, Shigyo AI. This innovative AI aims to transform the way legal and accounting professionals operate, with impressive accuracy rates of 95% in tax accountant exams, 92% in certified public accountant exams, and 95% in judicial exams.

Since the beta version was released in March 2025, feedback from experts and general users has driven significant improvements, including the expansion of its service areas, the addition of membership features, and the introduction of a Plus mode for in-depth responses. The launch marks a complete overhaul of the product, now rebranded as a service designed specifically for professionals in these fields.

Shigyo AI: A Tool for Reliable Information

The core mission of Shigyo AI is to provide a tool built on a foundation of trustworthy data from official public institutions. Recognizing the overwhelming variety of information available, Shigyo AI utilizes a unique system to limit its references strictly to credible, primary sources. This approach enables users to access reliable information quickly and efficiently, setting it apart from typical AI solutions that may produce misleading information or hallucinations. Through the integration of a retrieval-augmented generation (RAG) technique, Shigyo AI offers significantly higher accuracy than generic AI in professional fields.

Key Features of Shigyo AI

1. Tax AI: Gathers information solely from notable public sources such as the National Tax Agency and the Ministry of Finance.
2. Legal AI: Directly accesses legal texts via APIs from the Digital Agency, generating responses at the clause level.
3. Accounting AI: Referencing standards published by the Accounting Standards Board of Japan (ASBJ), this feature provides structured insights into accounting matters.

By explicitly linking sources in each response, Shigyo AI serves as a practical supplementary tool for experts and provides general users with direct access to public resources.

General-Purpose AI

To further enhance utility, the product includes a general-purpose AI capable of tackling a wide range of inquiries, and a business email response AI that generates formal and casual response templates simultaneously. All specialized AIs will be available even under the free plan, allowing users to register using just an email address or a Google account, creating an efficient onboarding experience.

Notable Advancements

Compared to the beta version, the official release boasts several significant improvements:

- Enhanced stability and response quality with a complete system overhaul.
- The Plus mode offers deeper responses through increased thought time and reference data.
- Continuous question functions allow for context-aware conversational exchanges.
- Word output and table copying capabilities facilitate easier integration into everyday work.