H3ロケットの新形態とは　初の補助ブースター無し機体、難しさは？：朝日新聞

Japan's struggling flagship H3 rocket returns to flight

JAXA's H3 rocket successfully launched Friday with its low-cost "30 configuration" featuring triple LE-9 engines—the sixth success after two failures, directly competing with SpaceX. The variant is critical to Japan's space security strategy and supports its planned 2028 Mars mission.