Japan's 12 automakers saw their domestic production slip 0.7 percent to 922,677 units in July, marking the first year-on-year decrease in two months, the Japan Automobile Manufacturers Association said Thursday.

The association attributed the poor results to weak demand in Japan and the United States, as well as the firms' bolstering of car manufacturing operations overseas.

Car output dropped 2.3 percent to 754,018 units, marking the first decrease in two months, while production of trucks rose 8.5 percent to 163,697 units, up for the seventh straight month.

Bus production fell 14.5 percent to 4,962 units, marking the first decrease in two months.