
Mari Yamamoto Regnier, Business Attorney in Chicago, Illinois
Over 33 years of legal practice · focused on Business, Employment, and General
PartneratBarnes & Thornburg LLP
Chicago, IL
Practicing business in Chicago since 1993.
- 33+
- Years practicing
- 1
- Bar admission
Practices in
Are you Mari Yamamoto Regnier?
This profile was built from public bar records and is still unclaimed. Claim it free to control your photo, bio, and fees — and get client inquiries sent straight to you.
Quick answer
Mari Yamamoto Regnier is a partner based in Chicago, IL. The practice focuses on Business, Employment, and General. Mari has over 33 years of legal experience. Currently practicing at Barnes & Thornburg LLP.
- Based in
- Chicago, IL
- Experience
- over 33 years
- Known for
- Business · Employment · General
- Handles Business, Employment, and General matters from Chicago, IL.
- Over 33 years of practice as a licensed attorney.
About Mari Yamamoto Regnier: Mari Yamamoto Regnier is a partner based in Chicago, IL. The practice focuses on Business, Employment, and General. Mari has over 33 years of legal experience. Currently practicing at Barnes & Thornburg LLP.
Areas of practice
Mari's practice areas in Chicago
Mari concentrates on business, employment, general, and immigration. Each area below outlines the kind of case Mari handles, typical outcomes to expect, and how the intake process starts.
Business
View other Business attorneys
Employment
View other Employment attorneys
General
View other General attorneys
Immigration
View other Immigration attorneys
Business cases in Chicago, Illinois
Mari takes business matters in Chicago, Illinois. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before Mari agrees to represent you.
Employment cases in Chicago, Illinois
Mari takes employment matters in Chicago, Illinois. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before Mari agrees to represent you.
General cases in Chicago, Illinois
Mari takes general matters in Chicago, Illinois. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before Mari agrees to represent you.
Immigration cases in Chicago, Illinois
Mari takes immigration matters in Chicago, Illinois. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before Mari agrees to represent you.
Biography
Mari Yamamoto Regnier, business attorney serving Chicago
Mari Yamamoto Regnier is a partner based in Chicago, IL. The practice focuses on Business, Employment, and General. Mari has over 33 years of legal experience. Currently practicing at Barnes & Thornburg LLP. Mari works from Chicago, Illinois and takes on business matters across the region.
Mari Yamamoto Regnier is a lawyer practicing business, global services, corporate and 3 other areas of law. Mari received a B.A. degree from Ochanomizu University - Tokyo, and has been licensed for 33 years. Mari practices at Barnes & Thornburg LLP in Chicago, IL.
Mari's approach to business cases
Mari Yamamoto Regnier is a lawyer practicing business, global services, corporate and 3 other areas of law. Mari received a B.A. degree from Ochanomizu University - Tokyo, and has been licensed for 33 years. Mari practices at Barnes & Thornburg LLP in Chicago, IL.
Clients Mari works with
Mari reviews new inquiries case-by-case for business, employment, and general matters in Chicago and the surrounding Illinois area.
Credentials
Credentials — where Mari studied and practices
Indiana University School of Law-Indianapolis
J.D. · 1992
Ochanomizu University - Tokyo B.A. University of Wisconsin M.A.
—
Jurisdictions
Mari's state bar admissions
Illinois U.S. Distri
1993 · ACTIVE
Mari studied at J.D. in Indiana University School of Law-Indianapolis and — in Ochanomizu University - Tokyo B.A. University of Wisconsin M.A..
Law school and academic background
Mari completed J.D. in Indiana University School of Law-Indianapolis and — in Ochanomizu University - Tokyo B.A. University of Wisconsin M.A.. Formal legal training is one signal of substantive knowledge — the day-to-day practice Mari runs in Illinois is where that training gets applied to real client questions.
Locations
Mari Yamamoto Regnier's office in Chicago
Mari's primary office is at One North Wacker Drive, Suite 4400, Chicago, IL, 60606-2841. In-person meetings are by appointment; a phone intake usually comes first.
Barnes & Thornburg LLP
One North Wacker Drive, Suite 4400
Chicago, IL 60606-2841
Open in Google MapsClient feedback
Client reviews of Mari Yamamoto Regnier
Mari has not yet collected verified client reviews on LawyersListed. Reviews here are all from confirmed clients; anonymous ratings are moderated out.
No reviews yet
Only verified clients who have consulted with Mari Yamamoto Regnier can leave a review.
Schedule your consultationHiring guide
How to hire Mari Yamamoto Regnier — what to expect in your first consultation
Working with a new business attorney should feel structured. Here's how the first two conversations with Mari usually go, from the moment you request a consult to the day representation begins.
Consultation formats and pricing
Mari charges for the initial consult. That fee is credited toward representation if you retain Mari's office.
What to bring to your first meeting
Bring any documents you already have — police reports, medical records, filed pleadings, correspondence from an insurer, a copy of the contract at issue. If you're not sure, err on the side of bringing everything; Mari will tell you what matters and what doesn't.
Questions to ask a business attorney in Chicago, Illinois
A short list to run through before you commit: How many business matters have you handled in the last year? What's your fee structure? Who else in the office will work on this? What's your realistic estimate of timeline and range of outcomes? How do I reach you between meetings?
Fees & payment
Fees, payment methods, and consultation options for Mari
Mari discusses fees during intake so the arrangement fits the matter. Contingency, hourly, and flat-fee options are all common in business practice — ask which fits.
Hourly rates, contingency fees, and flat-fee options
Every business matter is priced differently. Simple document review might be a flat fee. Injury litigation is often contingency. Complex commercial disputes usually run hourly with a retainer. Mari confirms the model in the engagement letter before any work starts.
Payment methods and payment plans
Mari's office accepts standard payment methods. Ask about payment plans if the retainer is a stretch — many business practices work with clients on structured schedules.
Frequently asked
Frequently asked questions about Mari Yamamoto Regnier
How much does it cost to hire Mari for a business case?
Cost depends on the type of matter, the fee model (contingency, flat, hourly), and how contested the case becomes. Mari walks through the likely range during the consult so there are no surprises.
Does Mari offer a free consultation?
Mari charges for the initial consult; that fee is credited toward representation if you retain Mari's office. Some business attorneys offer free consults — check Mari's current terms during booking.
How long do business cases in Illinois typically take?
Simple business matters can wrap in a few weeks; disputed cases can run 6–18 months from intake to resolution, longer if the matter goes to trial. Mari gives a realistic estimate for your facts at the consult — vague answers here are a red flag.
Can Mari take my case if I'm outside Chicago?
Mari is licensed in Illinois. Matters governed by Illinois law are the natural fit. Out-of-state matters are handled case-by-case, sometimes with local co-counsel. Ask during intake — Mari will tell you if the case is a fit or refer you to someone closer to your court.
What should I bring to my first meeting with Mari?
Bring every document that touches the dispute: contracts, correspondence, police or medical reports, filed pleadings, invoices, photographs, insurance letters. Also bring a written timeline of what happened, in your own words. Mari will filter what matters — over-preparing at intake is always cheaper than needing a second meeting.
Is Mari accepting new business clients right now?
Mari's intake status shifts week to week. Submit the form; the office will confirm availability or refer the matter out.
Areas served
Business attorneys serving Chicago, Springfield and Northbrook in Illinois
Mari handles business matters throughout Illinois. Each city below is a direct link into the search page for verified business attorneys in that community.
More counsel
Other top-rated business attorneys in Illinois
If Mari's intake is full or the fit isn't right, these business attorneys in Chicago handle similar matters. Every profile below is verified and open to consultations.





