SAMURAI Securities

Japanese companies / services

Aliases / services: SAMURAI証券 / SAMURAI証券株式会社 / オルタナバンク / Alterna Bank / SAMURAI Securities
Official website: https://www.alternabank.jp/

Each response applies only to its stated service scope. “Not listed” does not mean unpatched or unaffected.

Response status by service

Listed services and systems

Response status: Website secured; newsletters suspended
Response information checked: 2026-10-27 Rechecked: 2026-10-27

SAMURAI Securities, operator of Alterna Bank.

On October 22, it reported completed website security measures and no observed intrusion or leakage. Newsletters remain temporarily suspended while the mailing-service provider responds.

What users should do

Check the official website and social accounts for fund announcements and await the newsletter restart notice.

Official service URL

https://www.alternabank.jp/

Source URLs

Official PHP response and scopehttps://www.alternabank.jp/company/news/detail?id=2803Response evidence
Operating entityhttps://www.alternabank.jp/company/indexService and operation documentation

Related official sources

Official PHP response and scopeOfficial notice
Operating entityOfficial information directory