New York attorney record · Judicial Dept 1
Koichi Ariizumi
Columbia alumna, admitted to the New York bar in 1992. Decades of status, address, and registration history on this record come straight from the NY Office of Court Administration.
- 1992
- Admitted
- 34
- Years in bar
- 2471043
- NY reg #
The record in one line
With 34 years on the register since a 1992 admission, Koichi Ariizumi ranks among the New York bar's most senior active practitioners, longer-tenured than 71% of the currently-active bar.
- 34 yrs
- in active practice since admission
- Active
- current bar status: "Currently registered"
- Top 29%
- by tenure among active NY attorneys
- Law school
- Columbia
Data updated August 2026
What this profile tells you
Bar status & tenure
Registration 2471043 with the New York bar authority has long belonged to Koichi Ariizumi, a veteran practitioner still in active good standing. Registration is recorded within Judicial Department 1, the appellate division overseeing this attorney's home district.
Practice context & education
Practice address is listed under Marubeni Corporation Legal Dept, located in Tokyo 100-8088. Educational background: COLUMBIA (5,610 registered alumni).
State context & due diligence
After 34 years on the register, Koichi Ariizumi still falls within the New York bar's active cohort, a share of the register detailed further below.
Experience vs. the active New York bar
Few active New York attorneys match Koichi Ariizumi's 34 years since admission in 1992.
34 years on the New York bar
Years since admission, all currently-active NY attorneys
34 Top 29% higher than 71% of 290,787 active NY attorneys
Each bar is a band; taller bars hold more active NY attorneys. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source NY Office of Court Administration, Attorney Registration · August 2026
How Koichi compares to fellow Columbia alumni
Among the 2,448 Columbia graduates in the New York register, Koichi Ariizumi is longer-tenured than 69%.
34 years vs. Columbia alumni
Years since admission - 2,448 NY-registered alumni of this school
34 Top 31% higher than 69% of 2,448 fellow alumni
Each bar is a band; taller bars hold more fellow alumni. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source NY Office of Court Administration, Attorney Registration · August 2026
Columbia's active-bar rate
Of Columbia's 5,610 alumni in the New York register, 48.8% currently hold "Currently registered" status, below the statewide average.
Columbia alumni, active-bar rate
The 1992 admission class today
Of the 6,498 attorneys admitted to the New York bar in 1992, 59.2% are still "Currently registered" today, below the statewide average across all admission years.
Professional Details
- Status
- Currently registered
- Registration Number
- 2471043
- Year Admitted
- 1992 (34 yrs · veteran)
- Judicial Department
- 1
- Next Registration
- Jun 2028
Location & Contact
- Company
- Marubeni Corporation Legal Dept
- City
- Tokyo 100-8088
- Phone
- 81-3-3282-4855
Education
Status Distribution Across the New York Bar
Koichi Ariizumi's current status, "Currently registered", places this attorney in the 67.2% of the 432,625-attorney New York register currently marked active.
Full statewide breakdown & source note
Source: NY Office of Court Administration, Attorney Registrations. Status counts reflect the latest reporting cycle. Bar status confirms registration only; it does not imply competence, specialty fit, or freedom from complaints.
Near-tenure Columbia alumni
Fellow alumni on the NY register whose admission year is closest to 1992 (excluding same-firm colleagues above).
Same admission year (1992), other cities
NY-registered attorneys admitted in 1992 whose listed office city differs from Tokyo 100-8088, a vintage cohort, not a neighborhood list.
Verify This Attorney
Verify on NY Courts Attorney SearchBefore you rely on this record
Koichi Ariizumi's "Currently registered" listing confirms bar standing only, it is a registration fact to verify, not a verdict on quality or competence.
Frequently Asked Questions
Where is Koichi Ariizumi licensed?
Koichi Ariizumi is licensed to practice law in New York.
When was Koichi Ariizumi admitted to the bar?
Koichi Ariizumi's admission to the New York bar dates back to 1992.
Where did Koichi Ariizumi go to law school?
Koichi Ariizumi attended COLUMBIA.
What company does Koichi Ariizumi work for?
Koichi Ariizumi is associated with Marubeni Corporation Legal Dept in Tokyo 100-8088.
Is Koichi Ariizumi in good standing?
Yes, Koichi Ariizumi holds active bar status ("Currently registered").
Cite this page & disclosure
Sourced from the NY Office of Court Administration, informational only, not legal advice. Full disclosure.
Read our methodology - how this data is sourced, computed, and verified.