Japan's food self-sufficiency rate in calorie intake improved by about 1 percentage point to 41 percent in fiscal 2008, for the second straight annual rise. But, as farm minister Shigeru Ishiba said, one cannot hail the rise once various factors are taken into consideration.

Of the 1.1 point rise, 0.4 percentage point came from a rise in the self-sufficiency rate for sugar cane. This was because Okinawa Prefecture, a major grower of sugar cane, suffered less damage from typhoons than in the previous year. Meanwhile, the rate for animal-derived products increased 0.3 percentage point after high prices reduced cheese imports. Thus, actual improvements in Japan's competitiveness are not apparent.

The food self-sufficiency rate in calorie intake stood at 73 percent in fiscal 1965 but fell to 37 percent in fiscal 1993. After holding to about 40 percent from fiscal 1998 to 2005, it dropped to 39 percent in fiscal 2006 but recovered to 40 percent the next year. In contrast with Japan, the rate was 128 percent for the United States and 70 percent for Britain, in 2003.