JAXA successfully launches Japan's new flagship rocket, the "H3," inserting it into orbit.
Second-stage engine, previously failing in Unit 1, successfully ignites and separates mock satellite.
JAXA Chairman announces rocket "flighted as planned," marking milestone in Japan's space activities.
H3 rocket aims to enhance Japan's international competitiveness & ensure space independence.
H3, successor to "H2A," developed jointly with Mitsubishi Heavy Industries, promises cost-effectiveness.
H3's launch cost of about 5 billion yen makes it attractive for commercial satellite launches.
H3 scheduled to supply U.S.-led lunar exploration program Artemis, enhancing its international importance.
Second successful launch follows first launch failure in March, demonstrating progress in Japan's space program.