NTT Solmare Co., Ltd. confirmed on Oct 16 that a third party accessed systems managing Comic Seima (コミックシーモア) member data and that some registered member information leaked. Timeline: Oct 15 ~11:35 JST the company judged unauthorized access likely, stopped the service, and blocked the access; Oct 16 investigation confirmed leakage from the member-info system. Exposed so far: email, hashed password, DOB, gender, nickname. Count still under review. Company says credit cards are not held in the affected system; purchase history and MY Bookshelf leakage/loss/corruption not confirmed. Users who reuse the same email+password elsewhere should rotate those credentials and watch for phishing impersonating Comic Seima.