Complex sentence: It was then later, designated as "15W" by the JTWC as it moved towards the east of Taiwan and rapidly became a tropical storm and gave the name Toraji by the JMA on September 1.
Split into simpler sentences: It was then later, designated as "15W" by the JTWC as it moved towards the east of Taiwan. It rapidly became a tropical storm and gave the name Toraji by the JMA on September 1.