lets count!

Japanese ppl eat 50kg of rice per capita per year?*

price of 1kg of rice in tokyo $4.33**

so rice expenditure was $216.50/year? now up 60% to $346.40? a $130 increase?

the poorest 7% of households made under 1m yen?***

so thats about $6500? so a 2% or less hit to all but the poorest 7% of Japanese households. median is 4-5m yen..lets pick 4.5m for convenience..so around $30k..n $130 is less than half a percent of household income.

i don't know where's the threshold for rounding ¯\_(ツ)_/¯

* https://www.statista.com/statistics/1228187/japan-per-capita...

**https://www.numbeo.com/cost-of-living/prices_by_city.jsp?ite...

***https://www.statista.com/statistics/614245/distribution-of-a...