Tokyo, Feb 28: The ruble sank nearly 26% against the U.S. dollar early Monday after Western nations moved to block Russian banks from the SWIFT global payment system.
The ruble was trading at a record low 105.27 per dollar, down from about 84 per dollar late Friday.
Over the weekend, Japan joined the moves by the U.S. and other western nations to impose more sanctions against Russia.
Restrictions on the Russian central bank target its access to more than 600 billion in reserves the Kremlin has at its disposal. They hinder Russia's ability to support the ruble as it plunges in value.
Sanctions announced earlier had taken the Russian currency to its lowest level against the dollar in history.