Nikkei reports that the US workspace tool company Notion announced on the 10th that part of users' AI chat content had leaked, attributing it to a cyberattack on its AI partner Fireworks AI, whose unauthorized access it was notified of. Related coverage lists Japanese leaks at the Cabinet Office, Step Golf, YmirLink and others, quotes Notion's chief executive saying operating companies should hold data, and advises changing passwords and watching for scam emails.