The Japanese government has expanded a ban on exports to Russia as part of tightened sanctions over the country's invasion of Ukraine.

The additional ban imposed on Wednesday covers 758 items, including automobiles and optical equipment.

Auto-related items include gasoline and diesel cars with an engine displacement of over 1,900 cc, hybrid and electric vehicles, and parts such as tires for large vehicles.

Used Japanese cars, which are popular in Russia, are also subject to the broadened embargo.

The government had earlier prohibited exports of trucks and luxury vehicles to Russia.

The move comes after leaders of the G7 nations agreed to strengthen sanctions against Russia at their summit in Hiroshima in May.

The United States and the European Union have already widened their restrictions on vehicle exports to Russia.