Mariko Hirose
On the New York attorney register since 2010 · office in Washington, DC
PlainAttorney’s reading of the public register file, not a court record.
- Registration No.
- 4802674
- Admitted
- 2010 · First Department
- Status
- Currently registered
- Next registration
- Mar 2028
Mariko Hirose is currently registered on the New York attorney register file of Sep 29, 2026. Admitted in 2010 in the First Department, with an office in Washington, DC; next registration due Mar 2028. The status is the same in all 3 files we hold.
What this status means on the register
On the register, “Currently registered” means Mariko Hirose has filed the biennial registration the court system requires; the next one is due in Mar 2028.
- Currently registered unchanged
- Currently registered unchanged
- Currently registered the first file we hold
Source: NY Office of Court Administration, attorney registration file (data.ny.gov, dataset eqw2-r5nb), downloaded Sep 29, 2026; the Jul 3, 2026 and Aug 6, 2026 files for the history.
Others who list this employer on the register
4 other attorneys list Americans United for Separation of Church and State or one of its other names as their employer on the register; 3 of them were admitted before 2010, and all 5 give an office in Washington, DC. The 4 whose admission is closest to 2010, earliest first:
| Attorney | Admitted | Status |
|---|---|---|
| Alessandro Nicola Terenzoni | 2007 | Currently registered |
| Catherine Elizabeth Barrett | 2009 | Currently registered |
| Amy Tai | 2009 | Currently registered |
| Nikolas Peter Nartowicz | 2013 | Currently registered |
Source: NY Office of Court Administration, attorney registration file (data.ny.gov, dataset eqw2-r5nb), downloaded Sep 29, 2026; employer spellings merged (methodology).
Where this record sits on the register
Mariko Hirose studied at Stanford Law School. 615 of its 2,162 living graduates on the register were admitted in the 2010s, as Mariko Hirose was.
- Same law school
- 2,162living graduates; 88.3% registered (current or due), against 87.1% overall
- Office in Washington, DC
- 12,527living registrants (outside New York State)
Of the 12,527 living registrants with an office in Washington, DC, 6,382 were admitted before 2010 and 5,681 after.
Source: NY Office of Court Administration, attorney registration file (data.ny.gov, dataset eqw2-r5nb), downloaded Sep 29, 2026; living registrants only.
Questions this record leads to
- Stanford Law School graduates on the register2,162 living, 88.3% registered.
- New York-admitted attorneys in Washington, DC12,527 living registrants give an office there.
- Admitted in 201010,128 people admitted in 2010 are on the register, 3,126 of them through the First Department.
- Every registration that reads “Currently registered”286,911 on the register file of Sep 29, 2026, by decade of admission.
- What a New York lawyer may chargeThe court rules on fees, retainers and fee disputes, each cited.
How to confirm it officially
For a statement of Mariko Hirose’s standing, contact the Attorney Registration Unit of the NY Office of Court Administration (nycourts.gov/attorneys), or ask the Appellate Division, First Department, which admitted Mariko Hirose in 2010. The register places the office outside New York, so a complaint would go to that department’s grievance committee (22 NYCRR 1240.7(a)(2)).
This page reads the register file of Sep 29, 2026, and the court system’s own search can be newer; the register shows only the current value, so a suspension that ended before the files we hold, or a censure, leaves no trace here (Appellate Division decisions are published through the court system’s Law Reporting Bureau).