Some 10,600 metric tonnes of so-called staple rice – which is consumed at meals as opposed to rice used for feed or ingredients in other products – were imported by companies such as trading firms and wholesalers despite high levies.

While that’s still a small amount compared to the roughly 7 million tonnes eaten by the Japanese each year, it represents a huge jump from the 3,004 tonnes imported for the entire last financial year that ended in March.

Rice prices in Japan have doubled since last year after an extreme heatwave hit the 2023 harvest which was then exacerbated by stockpiling following an earthquake and additional demand from a boom in tourism.

To tackle the problem, Japan’s government began releasing stockpiled rice directly to retailers from late May, allowing some consumers to snap up 5kg of rice for about ¥2,000 (US$13.85) – less than half of average supermarket prices.

Japanese restaurants and consumers are increasingly turning to US brands in search of cheaper prices.

Japan takes a heavily protectionist stance towards its most basic food and traditionally has not had to rely on imports.

Private-sector imports are subject to a levy of ¥341 per kg.

The government can also import 100,000 tonnes of staple rice tariff free under World Trade Organization rules.

It decided to hold a tender for tariff-free imported rice this month, earlier than the usual auction in September, to help lower soaring prices.