# Japan Brokerage IwaiCosmo Hit With Unauthorized Trades

> Japanese brokerage IwaiCosmo reports unauthorized trades after cyberattack on system operator Trade Works.
- Title: Japan Brokerage IwaiCosmo Hit With Unauthorized Trades
- Summary: Japanese brokerage IwaiCosmo reports unauthorized trades after cyberattack on system operator Trade Works. Japan brokerage IwaiCosmo Securities confirmed…
- Keywords: iwai cosmo, trade works, unauthorized trades, cyberattack, japan brokerage, news, business, world, Japan, Brokerage, IwaiCosmo, Hit
- Source: Nikkei Asia — https://asia.nikkei.com/spotlight/cybersecurity/japan-brokerage-iwaicosmo-hit-with-unauthorized-trades-in-cyberattack
- Published: 2026-10-20T17:18:53+00:00
- Read time: 1 min
- Topics: iwai cosmo, trade works, unauthorized trades, cyberattack, japan brokerage, news, business, world
## IwaiCosmo Securities
Japanese brokerage IwaiCosmo Securities reported unauthorized client transactions after cyberattack on its trading system operator Trade Works.
## Client Accounts Restored
Affected client accounts were restored following breach at system operator Trade Works that compromised personal data on 4,975 people.
## Data Breach Impact
Cyberattack at Trade Works led to unauthorized trades in client accounts and personal data compromise for 4,975 individuals.
## Key takeaway

Japan brokerage IwaiCosmo Securities confirmed unauthorized client transactions following cyberattack on its trading system operator Trade Works.