DWANGO Co., Ltd.

Companies / web services

Aliases / services: ドワンゴ / DWANGO / ニコニコ / niconico / DWANGO Co., Ltd. / 株式会社ドワンゴ
Official website: https://dwango.co.jp/

Sources identifying the operating company

https://dwango.co.jp/company/

Each response applies only to its stated service scope. “Not listed” does not mean unpatched or unaffected.

Response status by service

Niconico-related business partner and personnel records

Response status: Not listed
Response information checked: 2026-10-29

Current re-audit: Related incident verified; PHP connection not stated · Research date: 2026-10-29

The 2024 attack exposed DWANGO business-partner/personnel information. The notice reports no confirmed leakage of Niconico login emails, passwords or card details.

Scope: A PHP connection and response to the current PHP vulnerabilities are not listed.

What users should do

Report publication of your own data to the official contact and request removal. Do not redistribute leaked data.

Official service URL

https://dwango.co.jp/

Source URLs

Leak investigation, August 5, 2024https://www.kadokawa.co.jp/topics/12088/Service and operation documentation

Related official sources

Official operator informationOfficial information directoryOfficial evidence identifying DWANGO Co., Ltd. and the relevant business.
Leak investigation, August 5, 2024Official notice; link to this PHP incident unconfirmedThe 2024 attack exposed DWANGO business-partner/personnel information.