Could Japan feed itself during recovery from a severe solar storm?

How would Japan's food supply affect its recovery after the severe Carrington event imagined here?

Major shortages are expected, but productive agriculture, food-distribution experience and shorter internal transport distances are offered as reasons Japan could recover.

Japan's food supply is a constraint on the proposed maritime recovery scenario. Substantial shortages are expected even though its agriculture is described as productive and its food distribution as highly developed. A speculative shift of workers into farming could ease labor shortages, but it would not remove the immediate disruption. Japan's smaller territory is also offered as an advantage over China, the United States and India because food has shorter internal distances to travel.