TOKYO—Japan and Indonesia pledged on Tuesday to tighten security ties and signed a deal to facilitate transfers of defense equipment and technology, as their near neighbor China expands its economic and military might. China’s territorial claims in the East and South China seas have become a priority issue in an increasingly testy Sino-U.S. relationship and also raise significant security concerns for Japan. “I think this is (a) historical first in bilateral relations between Japan and Indonesia,” Indonesian Defense Minister Prabowo Subianto said, referring to the transfer pact. “We invite the Japanese side to participate in the modernization of Indonesia’s defense capacity. We also encourage joint training between our services – maritime and also land forces,” he told reporters. Prabowo made the comment at a joint media appearance in Tokyo following a meeting of the Japanese and Indonesian foreign and defense ministers. “We exchanged views on the situation in the East …