AI Native Law Firm for Modern Enterprises

LegalAgent is an AI Native Law Firm specialized in corporate legal work.

Contact us View practice areas
Standard turnaround

As a rule, we deliver within one business day.

Same-day support where urgency requires it.

Pricing

Both monthly retainer and spot matters are fixed-fee.

Even where hourly billing is used, we set a fee cap.

Initial consultation

30-minute free online meeting

Within the initial consultation, we can also provide legal answers where appropriate.

Trusted by leading companies,
from prime-listed enterprises to startups

Client companies served*150+

* Figures are approximate, based on matters handled by our firm; actual figures vary by matter.

KADOKAWAYAMAPLAPRASOPTIEUM BiotechnologiesConcrewjammNumberlineThingsYStoryKomon BankLumosCLIPJASOTCGPRO
FRONTEOACROVEAVA IntelligenceReDeltaHinotoriLINEA InnovationsHorizontalTECHSUITESkyland VenturesNCVNOAHPacific MetaBoostCapital

Selected clients shown. Logos are listed in no particular order.

* Figures are approximate, based on matters handled by our firm; actual figures vary by matter.

Services and Practice Areas

From daily contract review to M&A, IPO, funds, litigation, data, FinTech, healthcare and crisis management, LegalAgent supports the full range of corporate legal matters.

Legal Outsourcing

The legal team lacks capacity

Embedded legal support for companies that need in-⁠house-⁠level responsiveness without building a full internal legal team.

View details

Monthly plan

LiteAdd a first legal consultation channel
JPY 10,000 / month
BasicReduce backlog in day-⁠to-⁠day questions
JPY 50,000 / month
StandardSupplement legal team capacity
JPY 100,000 / month
EnterpriseDeep commitment as part of your legal team
From JPY 300,000 / month

All amounts are exclusive of tax. English contracts, unusual contract types, oral/online consultation and additional work are confirmed separately. Monthly plans include Slack connectivity and free contract templates, and unused monthly fees can be carried forward for three months.

Startup Legal

No legal staff yet, or a financing round ahead

Capital policy, investment agreements, J-⁠KISS and stock option design.

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Example fixed matter fees

NDA review / drafting
JPY 10,000 per document
Fundraising document review(investment agreement, shareholders agreement, distribution agreement and articles)
JPY 150,000
Tax-qualified stock option issuance: agreement drafting
JPY 100,000

Fees exclude consumption tax. English matters are charged at twice the listed amount. Contracts and legal questions not listed above can also be supported. Complex matters may require an individual estimate.

M&A Support

Considering an acquisition or investment

Due diligence, SPAs and business succession support.

View details

Legal DD

2weeks

Fastest DD completion from the kickoff meeting*1

JPY500,000+

Minimum fee, fixed before engagement*2

*1 The DD completion period runs from the kickoff meeting and assumes that disclosure materials from the target company are in place. It varies with the volume of materials and the scope.

*2 The minimum fee of JPY 500,000 (tax excluded) applies to summary-format DD for target companies incorporated within the last three years. We quote a fixed fee before engagement based on the target's size and the scope.

LegalAgent practice areas

What Is an AI Native Law Firm?

The AI Agent does the work; attorneys make the legal judgments

Using the AI Agent lets us respond quickly at a lower price, while our attorneys safeguard the quality of every deliverable.

AI Agent: the work

  • Spots issues and checks similar contracts in minutes*
  • Draws on past know-how and templates
  • Drafts proposed contract revisions

Attorneys: the judgment

  • Decide the issues with the greatest business impact first
  • Prepare the revisions and a judgment memo
  • Take responsibility for the final legal judgment and the deliverable
DAY 0 (same day)By DAY 1 (next business day)
  1. DAY 0Request received
  2. DAY 0AI Agent first pass
  3. DAY 0Attorney review
  4. By DAY 1Delivery
  • Attorneys make the final callEvery deliverable is checked by an attorney who takes responsibility for it.
  • Your input is not used to train AIOn top of attorneys' statutory duty of confidentiality, input information is handled in environments where it is not used for AI training.
  • An AI Agent built in-houseOur own engineers develop it. Information Security Policy

* Figures are approximate, based on matters handled by our firm; actual figures vary by matter.

What We Deliver

Standard turnaround*
3–5 business daysTraditional law firmsLegalAgent1business day

As a rule, we deliver within one business day, so your business can keep moving.

We can respond two to ten times faster than traditional law firms.

Cost level*
vs. traditional firms1/2–1/5

Compared with traditional law firms, we provide legal support at roughly one-half to one-fifth of the cost.

Both monthly retainer and spot matters are fixed-fee. Even where hourly billing is used, we set a fee cap.

View fees

Consultation channel
Slack / Teams

Embedded in Slack and Teams, we work as part of your team, close to an internal legal department.

* Figures are approximate, based on matters handled by our firm; actual figures vary by matter.

Client Stories

“Both the turnaround and the price
have been a great help to us.”

“We now get review results back in roughly one business day. The cost is about JPY 10,000 per contract review, which feels like one-third to one-quarter of what we paid before.”

TCGPROKyotaro KaiDirector, TCGPRO Inc.

Legal Outsourcing

Contract review in about one business day,
for about JPY 10,000.

ItemBeforeAfter
Standard review4–5 business daysAbout 1 business day
Express review2–3 business daysAbout 1 business day
Fee per contract
(excl. tax)		JPY 30,000–50,000About JPY 10,000

Source: TCGPRO Inc. case study (interviewed on August 25, 2026)

Read the case study

Prime-listed company A

Contract review workload reduced by up to 90%

“The fixed-fee structure gives us strong cost visibility and peace of mind.”

Read more

“The fixed-fee structure gives us strong cost visibility and peace of mind.”

The legal department previously needed to review entire contracts of 10 to 30 pages, creating a heavy workload. After introducing LegalAgent, the company moved to an operation that efficiently checks only important points based on its review standards, reducing contract review workload to one-fifth to one-tenth.

Boost Capital

Significantly faster execution from investment decision to closing

“We can understand legal risks quickly at a fixed fee, which significantly accelerates investment execution.”

Read more

“We can understand legal risks quickly at a fixed fee, which significantly accelerates investment execution.”

For complex startup investment documents such as investment agreements, shareholders agreements, distribution agreements and articles of incorporation, LegalAgent provides high-quality deliverables quickly at a fixed fee. Speed is essential in startup investment.

Results

Service Record Breakdown*

Contract review and drafting
2,000+ matters
Startup legal mattersIncluding capital policy, shareholder meetings and registration support
200+ matters
Fundraising mattersSince 2024, including issuer-side and investor-side engagements
65 matters
AI and data transactions
50+ matters
M&A and capital transactions
20+ matters
Legal and investment DD
20+ matters

* Figures are approximate, based on matters handled by our firm; actual figures vary by matter.

Attorneys and
Engineers

Attorneys with diverse backgrounds, including founders, in-house counsel, business development professionals and Japan Patent Office secondees, cover the full range of corporate legal work.

Noriaki Asato
Noriaki AsatoRepresentative Attorney / Founder & CEODai-⁠ichi Tokyo Bar AssociationFounder · M&A · Fundraising
Takashi Sugai
Takashi SugaiAttorney / Corporate Legal PracticeDaini Tokyo Bar AssociationStartup legal · Contract operations DX · Business development experience
Kosuke Hirukawa
Kosuke HirukawaAttorney / Intellectual Property PracticeTokyo Bar AssociationIntellectual property · Patent disputes · Japan Patent Office secondment

Engineers

Shinya MakitaEngineer / Product EngineeringAfter joining LegalAgent, he has worked on building the internal data infrastructure and developing LegalAgent for Word.Sota MiyaEngineer / Software EngineeringJoined LegalAgent's product development.

Careers

Ride the big wave of generative AI!

LegalAgent is looking for colleagues who will, as members of an AI Native Law Firm, deliver the best legal services to our clients and build with us a law firm that defines the generative AI era.

Position
Experienced attorney (bengoshi)
Compensation
JPY 1,000,000 per month + incentive
Requirements
At least three years of corporate legal experience. M&A experience is welcome.
Generative AI skills
It does not matter whether you can use it today. We will teach you everything.
AI environment
Claude Code and Codex, paid for by the firm

Other openings: Commercial registration and corporate procedures staff / Engineers / Staff

Apply for a casual interview View careers

Frequently Asked Questions

  1. Yes. Based on our experience providing AI services and developing AI Agents, attorneys with corporate legal expertise advise on AI governance, AI policies, AI use rules, terms of use for generative AI services, privacy and intellectual property.

  2. Yes. LegalAgent provides AI-assisted legal outsourcing as a core service. We can support contract review, legal strategy and broader corporate legal work as a substitute for or extension of your legal department.

  3. Yes. We support companies in a way that is close to an internal legal team, covering contract review, terms of use, internal rules, labor, IP and compliance. Companies can consult us before hiring a dedicated legal member.

  4. Yes. We support English contract review, drafting and translation. Fees for English matters may differ from Japanese matters, so we will provide a separate quote.

  5. We can start as early as the same day after the initial consultation. Please contact us for details.

AI Legal Lab

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LegalAgent for Word,
built for legal work

In addition to our law firm services, LegalAgent provides LegalAgent for Word, a Word add-in for contract review and legal document drafting. It works inside Word files, revises content and adds comments based on your instructions.

Put an excellent associate
inside your Word file.

View details

Initial Consultation
is Free

We will learn about your business and legal function, then propose the most suitable support plan.
Please feel free to contact us for an online meeting.

Consultation Flow

  1. 01Send us the contact form
  2. 0230-minute free online meeting
  3. 03We propose the right plan
  4. 04Support can start the same day

Contact

Please contact us using the form below.

Information Security Policy