Koji Toshima
On the New York attorney register since 2006 · office in Tokyo, Japan
PlainAttorney’s reading of the public register file, not a court record.
- Registration No.
- 4386439
- Admitted
- 2006 · First Department
- Status
- Delinquent
- Next registration
- Oct 2026
Koji Toshima is delinquent on the New York attorney register file of Sep 29, 2026. Admitted in 2006 in the First Department, with an office in Tokyo, Japan; next registration due Oct 2026. The status is the same in all 3 files we hold. The month shown is the next cycle’s; the delinquency concerns an earlier registration the register did not receive.
What this status means on the register
On the register, “Delinquent” means the attorney has a registration the register shows as due and not received. Under the rule a failure to register results in referral to the Appellate Division for disciplinary action; the register does not show whether a given attorney was referred. How many hold this status.
- Delinquent unchanged
- Delinquent unchanged
- Delinquent the first file we hold
We show the 3 register files of the last twelve months (Jul 3, 2026, Aug 6, 2026, Sep 29, 2026). A change of standing between them is struck through in red; the routine birthday cycle is not.
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
144 other attorneys list Mori Hamada & Matsumoto or one of its other names as their employer on the register. The 5 whose admission is closest to 2006, earliest first:
| Attorney | Admitted | Status |
|---|---|---|
| Shi Kang | 2005 | Suspended, delinquent |
| Takeshi Komatsu | 2006 | Currently registered |
| Taro Omoto | 2006 | Currently registered |
| Mitsue Tanaka | 2006 | Suspended, delinquent |
| Takayuki Kihira | 2007 | 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
Koji Toshima studied at Columbia Law School (the register spells it “COLUMBIA LAW SCHOOL”).
- Same law school
- 18,953living graduates; 87.4% registered (current or due), against 87.1% overall
- Office in Tokyo, Japan
- 2,762living registrants give an office there (outside the U.S.)
Source: NY Office of Court Administration, attorney registration file (data.ny.gov, dataset eqw2-r5nb), downloaded Sep 29, 2026; living registrants only.
How to confirm it officially
The register is published by the court system; PlainAttorney shows it as released. For a statement of an attorney’s standing, contact the Attorney Registration Unit of the NY Office of Court Administration (nycourts.gov/attorneys), or ask the Appellate Division in the attorney’s department. The register places the office outside New York, so a complaint would go to the grievance committee of the First Department, which admitted this attorney (22 NYCRR 1240.7(a)(2)).
This page reads the register file of Sep 29, 2026; the court system publishes the file every few weeks, so its own search can be newer. The register shows only the current value: a suspension that ended before the files we hold, or discipline short of suspension such as a censure, leaves no trace here. Appellate Division decisions on attorney discipline are published in the New York Official Reports, online through the court system’s Law Reporting Bureau.