The article highlights the significant increase in the price of salmon caviar, a crucial ingredient in sushi, due to the impact of anti-Russian sanctions following the Ukrainian crisis and the surge in oil prices. The rise in food prices, including sushi ingredients, is attributed to the disruption in logistics and increased costs, especially affecting Norwegian raw salmon imported to Japan via Russia, which was a more economical route prior to the sanctions. The imposition of restrictions on Russian airspace for foreign carriers by the Russian government in response to sanctions has further complicated the situation, leading to higher costs and supply chain disruptions.