When did LegalBrain エージェント reach ¥1 billion in ARR?

It surpassed ¥1 billion in ARR in November 2026, 17.3 months after its May 2025 launch.

What makes LegalBrain エージェント different from general-purpose AI?

It answers only based on trusted legal literature such as laws, court precedents, and specialized books, and attaches citations and original source references to every answer.

How was the 'fastest' record determined?

Mitsubishi UFJ Research & Consulting investigated and found it the fastest arrival at ¥1 billion ARR for a single SaaS product offered by a listed Japanese company, measured from official launch.

Large Language ModelsAI Business & IndustryPR TIMES (AI)3h agoNov 11, 2026, 22:01 JST

LegalBrain エージェント hits ¥1 billion ARR, fastest for listed Japanese SaaS

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3 Key Points

What happened
LegalBrain エージェント reached ¥1 billion in ARR in November 2026, 17.3 months after its May 2025 launch; Mitsubishi UFJ Research & Consulting found this the fastest for a single SaaS product from a listed Japanese company.
Why it matters
The 17.3-month pace highlights how quickly a legal AI agent with cited sources can be adopted by law firms and corporate legal departments, though the record covers only listed Japanese companies.

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Context & Analysis

Lawyer.com has been building legal infrastructure in Japan for over two decades, starting with its lawyer search and legal consultation portal. That business created a network of law firms and corporate legal departments, which the company says it used to introduce LegalBrain エージェント directly to legal professionals from the start. The product also builds on the company's experience with CloudSign, its contract management platform launched in 2015, which took 56 months to reach ¥1 billion in ARR and surpassed ¥10 billion in standalone ARR in July 2026. LegalBrain エージェント reached the same ¥1 billion ARR milestone in 17.3 months. The company positions the agent as a shift from tools that help lawyers search for information to an AI agent that can take on research and issue-spotting work, with every answer tied to cited legal sources. It has also made the agent accessible through environments like Claude since September 2026, aiming to fit into the tools legal staff already use daily. The backdrop is a persistent shortage of legal and compliance personnel: a survey of listed companies found 77.3% of respondents reported insufficient staff in those departments.

FAQ

When did LegalBrain エージェント reach ¥1 billion in ARR?: It surpassed ¥1 billion in ARR in November 2026, 17.3 months after its May 2025 launch.
What makes LegalBrain エージェント different from general-purpose AI?: It answers only based on trusted legal literature such as laws, court precedents, and specialized books, and attaches citations and original source references to every answer.
How was the 'fastest' record determined?: Mitsubishi UFJ Research & Consulting investigated and found it the fastest arrival at ¥1 billion ARR for a single SaaS product offered by a listed Japanese company, measured from official launch.

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