New York attorney · Reg. #5530209

Atsushi Usui

Registered (registry: Currently registered)

Current employer

Simpson Thacher & Bartlett LLP · Tokyo · since at least September 2026

Admission

Admitted 2017, Third Department · Univ. of Tokyo (LL.B.), Univ. of California, Berkeley (LL.M.)

Employment history

• Simpson Thacher & Bartlett LLP · Tokyo · current

Compiled from NYS Office of Court Administration registration records and published NY Appellate Division decisions; current as of October 2026. Not an official record; verify with the NY Courts Attorney Search.