operational guidance (Iris Plaza official notice, Nov 5)
Tip: if you used Iris Plaza, rotate any reused password and ignore lookalike emails, SMS or sites asking for passwords or cards
Change the Iris Plaza password anywhere else you reused it; some stored passwords were encrypted, but reuse is still the risk.
Do not open attachments or links in unexpected mail or SMS, and do not give personal details, IDs, passwords or card numbers to lookalike sites or social accounts.
Official contact listed in the notice: Iris Plaza contact center 0120-108-824 (weekdays and Saturdays 9:30 a.m.–5:00 p.m. Japan time) or plaza_info@irisplaza.co.jp.