Yonex' sales jumped by 24 percent to 31.3 billion yen (€258.9m-$274.4m) in the six months through Sept. 30, but most of the growth took place in China, where the company's recently opened joint venture lifted its sales in the country by 241 percent to ¥8.8 billion (€72.8m-$77.1m), driven by badminton. Badminton and tennis performed well in Japan, but a flat golf market caused Yonex' domestic sales to be flat at ¥20.0 billion (€165.4m-$175.3m). Sales were down by 10 percent to ¥897 million (€7.42m-$7.86m) in the U.S., with badminton declining. European sales grew by 2 percent to ¥1,186 million (€9.81m-$10.4m). The overall gross margin improved by 2.4 percentage points to 44.8 percent, but net earnings fell by 64 percent to ¥441.7 million (€3.65m-$3.87m). Excluding foreign exchange losses and other items, they grew by 34 percent to ¥1,451 million (€12.0m-$12.7m).