NTT Docomo Inc. has disclosed that it provided user data to an arm of Amazon Japan without consent. The information shared includes phone numbers and mobile service plans. Approximately 340,000 users were affected by this data transfer.

Further details about the incident are available from the source. The disclosure was made by NTT Docomo Inc. on Wednesday, revealing the extent of the data shared with Amazon Japan's arm.

The incident involves a significant number of users, with around 340,000 individuals having their personal information shared without their consent.