#Japan #Tokyo #SWE-bench Verified #JAPAN AI Code #AI Coding Agent

JAPAN AI Code Achieves Remarkable Recognition in AI Development

In a significant breakthrough for artificial intelligence in software engineering, JAPAN AI, based in Shinjuku, Tokyo, has announced that its AI coding agent, JAPAN AI Code, has achieved an impressive 80.2% solution rate in the international SWE-bench Verified benchmark. This achievement places JAPAN AI Code at the forefront of AI development tools, showcasing its unique capabilities in solving practical programming challenges.

Understanding JAPAN AI Code

JAPAN AI Code operates on a foundational AI agent platform developed exclusively by JAPAN AI. Unlike traditional code completion tools, this innovative software development support agent autonomously handles various stages of coding, from task comprehension and investigation to implementation and verification. Its functions extend beyond simple code writing, encompassing bug root cause analysis, code reviews, test creation, and even comprehensive application development.

Fully integrated with JAPAN AI’s AI platform, JAPAN AI STUDIO, this powerful agent facilitates seamless access to organizational knowledge, documentation, and project data. Unlike isolated coding tools, JAPAN AI Code aids development within the context of the organization, tailoring its support to meet specific team needs.

The Significance of the SWE-bench Verified Benchmark

The SWE-bench Verified benchmark is an important international standard that measures the effectiveness of AI in addressing real software development issues. The benchmark features 500 questions derived from widely-used open-source projects like Django, Matplotlib, and scikit-learn, which reflect actual bugs and feature requests reported on GitHub, verified, and curated by human experts.

In this test, AI agents are only provided with a problem description and the source code repository, relying solely on this information to explore the codebase, identify issues, implement fixes, and ensure existing tests pass. No hints or answers are given.

Notably, JAPAN AI Code successfully solved 401 out of 500 questions, marking an outstanding solution rate of 80.2%—a testament to its efficiency and reliability.

Performance Comparison

When compared to other AI coding agents based on the SWE-bench Verified standards, JAPAN AI Code stands out:


This data, based on the official SWE-bench leaderboard from February 2026, emphasizes JAPAN AI Code’s superior performance.

Unique Features of JAPAN AI Code

The outstanding feature of JAPAN AI Code lies in its operation on a unique AI agent platform developed from the ground up by JAPAN AI. Many coding tools rely heavily on pre-existing AI model APIs, limiting their effectiveness. In contrast, JAPAN AI Code's agent platform incorporates a proprietary technology layer, allowing it to achieve accuracy and stability that standalone models cannot reach.

Key Technical Elements

1. Multi-Agent Cooperation: Complex tasks are divided among several specialized agents, enabling parallel exploration, analysis, and validation. For instance, specific agents might be dedicated to code structure analysis, extraction of testing requirements, and patch validation, promoting efficient problem-solving.

2. Optimal Tool Selection: JAPAN AI Code automatically selects and executes the best tool from over 100 options, autonomously handling necessary operations like file manipulation, code searches, and test executions.

3. Context Management: Through summarization techniques, the agent maintains relevant information over extended tasks, ensuring consistent performance.

4. Multi-Model Compatibility: It accommodates various AI models, including Claude, GPT, Gemini, and open-source alternatives, allowing teams to select the best model for their needs, both in terms of application and budget. The recent evaluation involved a combination of Claude 4.5 Opus and GPT-5.2 Codex, demonstrating high performance.

Advantages of JAPAN AI Code

• - Organizational Context Understanding: Integrated with JAPAN AI STUDIO, JAPAN AI Code can access project documents, past discussions, and internal knowledge bases, positioning it as a vital team member that comprehends organizational contexts.
• - Democratization of Engineering: Not solely for engineers, any JAPAN AI user can utilize natural language commands for automating tasks, file operations, and rapid application creation, enhancing cross-department productivity.
• - Flexible Quality and Cost Choices: By working with multiple AI models, users can choose based on task importance and budget, optimizing both quality and cost.

Practical Use Cases

For Engineers

• - Legacy Code Analysis and Modernization: Analyzes outdated code specifications, offering refactoring suggestions to modern structures, drastically reducing maintenance costs.
• - Automated Test Code Generation: Generates unit and integration tests based on existing code to improve quality.
• - Incident Response & Root Cause Analysis: Analyzes logs and source code to identify underlying issues quickly, minimizing recovery time.

For Non-Engineers

• - Self-Service Data Extraction & Analysis: Generates necessary SQL for data requests instantly, eliminating waiting times for engineers.
• - Immediate Development of Efficiency Tools: Rapid development of scripts or management interfaces for routine tasks is achievable on demand.
• - Transforming Ideas into Technical Specs: Converts vague business requirements into concrete functional specifications, reducing rework.

By merging with the no-code development environment JAPAN AI STUDIO, generated code or applications can be instantly deployed, streamlining immediate business applications.

Future Prospects

JAPAN AI is committed to the ongoing evolution of JAPAN AI Code. Plans include enhancements to the agent platform and the introduction of a terminal CLI tool for developers, allowing direct use of JAPAN AI Code within traditional terminal environments, fully integrated with JAPAN AI STUDIO. This aims to create a streamlined development experience from local coding to publication in one platform. Additionally, to maintain and elevate their world-class technical capabilities, JAPAN AI is actively recruiting talented engineers who share their vision for advancing AI agent technology.

About JAPAN AI

Founded with the vision of "Creating a sustainable future society through AI," JAPAN AI contributes to various industries by developing AI-related products and services.

Company Information

• - Name: JAPAN AI Inc.
• - CEO: Tomoaki Kudo
• - Headquarters: Shinjuku, Tokyo, Japan
• - Founded: April 2023
• - Business: Research and development of artificial intelligence solutions and consulting services
• - Website: JAPAN AI