The Federal Security Service of the Russian Federation (FSB RF; Russian: Федеральная служба безопасности Российской Федерации (ФСБ России), tr. Federal’naya sluzhba bezopasnosti Rossiyskoy Federatsii, IPA: [fʲɪdʲɪˈralʲnəjə ˈsluʐbə bʲɪzɐˈpasnəstʲɪ rɐˈsʲijskəj fʲɪdʲɪˈratsɨɪ]) is the principal security agency of Russia and the main successor agency to the Soviet Union’s KGB; its immediate predecessor was the Federal Counterintelligence Service (FSK) which was reorganized into the FSB in 1995. The three major structural successor components of the former KGB that remain administratively independent of the FSB are the Foreign Intelligence Service (SVR), the Federal Protective Service (FSO), and the Main Directorate of Special Programs of the President of the Russian Federation (GUSP).
https://en.wikipedia.org/wiki/Federal_Security_Service
ロシア連邦保安庁(ロシアれんぽうほあんちょう、露:Федеральная служба безопасности Российской Федерации、ラテン文字転写: Federal’naya sluzhba bezopasnosti Rossiyskoy Federatsii、 略称:ФСБ、英:Federal Security Service of the Russian Federation、略称:FSB)は、ロシア連邦の防諜、犯罪対策を行う治安機関。
https://ja.wikipedia.org/wiki/%E3%83%AD%E3%82%B7%E3%82%A2%E9%80%A3%E9%82%A6%E4%BF%9D%E5%AE%89%E5%BA%81