Maeda said up to around 300,000 sets of personal information were breached, including names, addresses and identity‑verification document numbers. This fact was given at a press conference in Tokyo.

He also confirmed that the leaked data contained bank account numbers, the account holders’ names, phone numbers and subscription‑plan details. No credit‑card information was compromised, according to the president.

The unauthorized access was detected on Wednesday, and the company suspended online services such as “My docomo” early Thursday. NTT Docomo plans to pay compensation to affected people, with the exact recipients to be decided later.

The president declined to confirm whether artificial‑intelligence agents were used, saying the investigation is still ongoing. The key takeaway is that a breach can expose many types of personal data, even if some information like credit‑card numbers remains safe.