(Reuters) - Japan's Prime Minister Yasuo Fukuda (C) signs his autograph on a guest book after he inspected Toyota Motors' plant in Tianjin, December 29, 2007, while Toyota Motor advisor Hiroshi Okuda (L) and president Katsuaki Watanabe (R) clap their hands. (Yoshikazu Tsuno/Pool/Reuters)

(Reuters) - Japan's Prime Minister Yasuo Fukuda (C) signs his autograph on a guest book after he inspected Toyota Motors' plant in Tianjin, December 29, 2007, while Toyota Motor advisor Hiroshi Okuda (L) and president Katsuaki Watanabe (R) clap their hands. (Yoshikazu Tsuno/Pool/Reuters)

(Reuters) - Japan's Prime Minister Yasuo Fukuda (C) signs his autograph on a guest book after he inspected Toyota Motors' plant in Tianjin, December 29, 2007, while Toyota Motor advisor Hiroshi Okuda (L) and president Katsuaki Watanabe (R) clap their hands. (Yoshikazu Tsuno/Pool/Reuters)

(Reuters) - Japan's Prime Minister Yasuo Fukuda (C) signs his autograph on a guest book after he inspected Toyota Motors' plant in Tianjin, December 29, 2007, while Toyota Motor advisor Hiroshi Okuda (L) and president Katsuaki Watanabe (R) clap their hands. REUTERS/Yoshikazu Tsuno/Pool (CHINA)

(Reuters) - Japan's Prime Minister Yasuo Fukuda (R) inspects an assemble line of Toyota Motors's plant in Tianjin, December 29, 2007. Fukuda played a friendly game of catch on his visit to China on Saturday, a symbol of warming ties between the North Asian rivals despite an intractable row over gas resources in disputed waters. REUTERS/Yoshikazu Tsuno/Pool (CHINA)

(Reuters) - Japan's Prime Minister Yasuo Fukuda (R) inspects an assemble line of Toyota Motors's plant in Tianjin, December 29, 2007. Fukuda played a friendly game of catch on his visit to China on Saturday, a symbol of warming ties between the North Asian rivals despite an intractable row over gas resources in disputed waters. REUTERS/Yoshikazu Tsuno/Pool (CHINA)

(Reuters) - Japan's Prime Minister Yasuo Fukuda (R) inspects an assemble line of Toyota Motors's plant in Tianjin, December 29, 2007. Fukuda played a friendly game of catch on his visit to China on Saturday, a symbol of warming ties between the North Asian rivals despite an intractable row over gas resources in disputed waters. REUTERS/Yoshikazu Tsuno/Pool (CHINA)

(Reuters) - Japan's Prime Minister Yasuo Fukuda (R) inspects an assemble line of Toyota Motors's plant in Tianjin, December 29, 2007. Fukuda played a friendly game of catch on his visit to China on Saturday, a symbol of warming ties between the North Asian rivals despite an intractable row over gas resources in disputed waters. REUTERS/Yoshikazu Tsuno/Pool (CHINA)

(Reuters) - Japan's Prime Minister Yasuo Fukuda (C) and his wife Kiyoko (L) inspect an assemble line of Toyota Motors's plant in Tianjin, December 29, 2007. Fukuda played a friendly game of catch on his visit to China on Saturday, a symbol of warming ties between the North Asian rivals despite an intractable row over gas resources in disputed waters. REUTERS/Yoshikazu Tsuno/Pool (CHINA)

(Reuters) - Japan's Prime Minister Yasuo Fukuda (C) and his wife Kiyoko (L) inspect an assemble line of Toyota Motors's plant in Tianjin, December 29, 2007. Fukuda played a friendly game of catch on his visit to China on Saturday, a symbol of warming ties between the North Asian rivals despite an intractable row over gas resources in disputed waters. REUTERS/Yoshikazu Tsuno/Pool (CHINA)