TOKYO—Japan will freeze the assets of four additional Russian banks from April 2, Finance Minister Shunichi Suzuki said on Thursday, taking to seven the total number Tokyo has slapped with such sanctions. Prime Minister Fumio Kishida’s cabinet approved the decision to freeze the assets of VTB Bank, Sovcombank, Novikombank and Otkritie, the Ministry of Finance said in a document. The move will take effect on April 2, a ministry official said. The banks are all closely related to the Russian government. The size of their assets was not immediately known but VTB Bank is the second-largest Russian bank in terms of assets, the official said. Targets of asset freezes also include dozens of individuals including Aleksandr Lukashenko, president of Belarus, which has provided footholds for Russia’s invasion of Ukraine. Tokyo has also decided to ban Belarus-bound exports. “Japan will firmly implement (the sanctions) together with other members of G7,” the …