== Typhoons == 

 I know that we usually don't apply numbers to hurricanes: for example, we usually don't call Hurricane Irene in 2011 "1109". 

 But numbers are used not only in Japan but in China, Korea, Vietnam, etc. Please look at Digital Typhoon: Typhoon Names (Asian Names). 

 Annual Report on Activities is an official report by RSMC Tokyo - Typhoon Center. Typhoon numbers are used in this official report. 

 Therefore, I think information of typhoon numbers is necessary for INTERNATIONAL ENCYCLOPEDIA (Wikipedia).