Making "Hiring AI Employees" the New Standard. Caster to Launch New Autonomous AI Agent Service in May.

Caster Co., Ltd. (Headquarters: Chiyoda-ku, Tokyo; Representative Director: Shota Nakagawa; hereinafter "Caster"), which realizes business transformation and productivity improvement for companies through AI x BPaaS, announced that it has begun efforts to provide a new AI agent service "AI Employee" that autonomously executes corporate tasks. The service is scheduled to be launched sequentially from May 2026.

This service is a new solution designed with the concept of "adding one AI employee to an organization." Multiple AI agents autonomously perform "consultation, requests, and execution" on communication tools, collaborating to provide cross-functional support for overall business operations.

■ Background: The Structural Challenge of "Human-Powered ERP" Born from the Spread of SaaS and AI

In recent years, while the adoption of SaaS and the utilization of generative AI have advanced for the purpose of business efficiency, the following challenges have become apparent in corporate workplaces:

• Duplicative work due to fragmentation between multiple systems

• Personalization of unaddressed tasks and an increase in reminder work

• Operational design lagging behind even after tool introduction

As a result, back-office operations, which should have been streamlined, are increasingly falling into a state of "human-powered ERP," where people connect and operate multiple tools and business flows.

Furthermore, with generative AI, challenges such as:

• Stalling at PoC (Proof of Concept / Pilot Introduction)

• Inability to handle exceptions

• Inability to integrate into operations

have led to a continued situation where full-scale implementation is not achieved.

In this context, what companies are seeking is not just a tool, but a mechanism that can complete tasks themselves.

■ Overview: "AI Employee" as a New Unit of Labor

This service is designed with the concept of "adding one AI employee to an organization."

Companies can simply give instructions to AI employees on communication tools such as Slack or Teams in their own environment, and the AI will autonomously interpret, decompose, and execute tasks. While it appears as if interacting with a single "AI Employee" on the front end, behind the scenes, specialized AI (sub-agents) for each job function collaborate to perform the tasks.

The term "AI Employee" here does not refer to a large-scale AI system or a single-function AI agent. We define an "AI Employee" as an AI agent that integrates multiple functions and handles both communication and output.

Currently, within Caster, 10 AI employees are operating as assistants in various departments.

This is a new form of securing business resources, "assigning" AI agents, which differs from conventional "hiring" or "dispatching."

■ Features and Value Proposition

1. "Assistant Mode" Operational from Day One of Introduction

Upon introduction, the service covers secretarial and assistant tasks such as chat and email communication, research, and document creation. Companies do not need complex prompt input or settings; they can start tasks simply by speaking to the AI employee.

2. "Professional Mode" Specializing in Highly Specialized Tasks

After interviewing the company's business content, it is possible to provide "Specialized AI Employees" optimized for specific tasks, with tuning specialized for accounting agency services, document creation, and more.

This allows AI employees to function not just as task assistants, but as dedicated personnel responsible for practical work.

3. Constantly Updated and Expandable Operating Environment for Each Company

The pace of AI technology evolution is extremely rapid, and in-house efforts to keep up lead to increased costs and reliance on specific individuals. With this service, Caster designs the optimal operating environment for each company and maintains/operates it with the latest AI architecture, enabling the use of AI agents in an always-optimal state.

■ Future Outlook: Transforming Back Offices into "Continuously Evolving Organizations"

This service expands traditional labor supply models such as temporary staffing and BPO, presenting a new option to the multi-trillion yen staffing market.

Until now, companies have addressed labor shortages by "hiring" or "outsourcing." Going forward, a third option will be added: "assigning AI."

Through this service, Caster will transform back-office operations from a "human-dependent structure" to an "AI-expandable structure," contributing to the productivity improvement of Japanese companies.

*The contents described in this release are based on current plans and may be subject to change depending on future development status.

■ About Caster

Under the mission of "Reinventing Everything About Work," Caster supports corporate productivity improvement and sustainable growth through AI x BPaaS. Since its founding in 2014, the company has operated entirely remotely, and through businesses such as the online assistant "CASTER BIZ" series (No. 1 in terms of companies introduced (*1)), it has supported over 6,000 cumulative accounts (*2). In the AI era, we will lead new ways of working and transform "the world of work" through the collaboration of AI and humans.

＜Company Profile＞

Company Name: Caster Co., Ltd.

Listed Market: Tokyo Stock Exchange Growth Market, Securities Code 9331

Representative Director: Shota Nakagawa
Head Office Location: Otemachi First Square West Tower 1F/2F, LIFORK Otemachi R06, 1-5-1 Otemachi, Chiyoda-ku, Tokyo

Established: September 2014
Business Activities: Human resource business operation, including online assistants
URL: https://caster.co.jp

*1: Company's own research based on a comparison of the number of companies that have introduced major remote assistant services and online assistant services in Japan (as of April 2025)

*2: Cumulative number of accounts with contract achievements in continuous services operated by the company