A trio of tropical depressions were also monitored by the JMA during late October. The first developed on October 21 about north of the Mariana Islands. The depression moved stationary until its circulation became exposed due to shear on October 23. The other two systems were also monitored very briefly by the JMA during October 22. One in the South China Sea as it moved westwards and fully dissipated six hours later, where its remnants made landfall in Vietnam during the next day; whilst the other persisted over in the Philippine Sea also bringing rainfall to Luzon during October 25, just before the arrival of Typhoon Cimaron. The Japan Meteorological Agency's RSMC Tokyo — Typhoon Center assigns international names to tropical cyclones on behalf of the World Meteorological Organization's Typhoon Committee, should they be judged to have 10-minute sustained windspeeds of 65 km/h, (40 mph). While the Philippine Atmospheric, Geophysical and Astronomical Services Administration assigns names to tropical cyclones which move into or form as a tropical depression in their area of responsibility located between 135°E and 115°E and between 5°N-25°N even if the cyclone has had an international name assigned to it. The names of significant tropical cyclones are retired, by both PAGASA and the Typhoon Committee. Should the list of names for the Philippine region be exhausted then names will be taken from an auxiliary list of which the first ten are published each season. Unused names are marked in .