Nikkei Headquarters has been disrupted by a week-old ransomware attack, according to the recent disclosure made by the publishing giant.

"Unauthorized access to the server was first identified on May 13, sparking an internal investigation," the business disclosed in a Thursday news release.

"Nikkei Group Asia immediately shut down the compromised server and took further steps to mitigate the damage."

Nikkei reports that it is currently assessing if the attackers had access to any consumer data presumably stored on the compromised systems.

"The compromised server undoubtedly held customer information, and Nikkei is presently analyzing the extent and depth of the incident," Nikkei explained.

During its investigation of the ransomware assault, the media conglomerate stated that it had discovered no indication of a data leak.

Nikkei and its Asian division notified the incident to the Japanese and Singaporean authorities responsible for the security of personal data.

Today, Nikkei's public relations office made the following statement: "We deeply regret the inconvenience we've created."

"We will take necessary steps in collaboration with relevant authorities and work to strengthen information security."

Nikkei also fell prey to a high-profile business email compromise (BEC) fraud two years ago, when it lost millions due to a single wire transfer.

One of Nikkei America's workers in New York City was duped by fraudsters posing as a Nikkei official into wiring $29 million to a bank account under their control.

Nikkei is one of the world's largest media conglomerates, with around 4 million print and digital subscribers and over 40 related firms engaged in publishing, broadcasting, events, database services, and index business.

The media conglomerate, which purchased the Financial Times in 2015, has dozens of international editorial bureaus and more than 1,500 journalists globally at present.