Weathernews has a track record of over fifty years as a global pathfinder weather information company. The company began with the quest of a young man to save the lives of sailors. This vision was taken up by weather technicians who became his collaborators, and Weathernews was established in 1986 as a group company of Oceanroutes. Oceanroutes itself originated from the Pacific Weather Analysis Corporation, which was founded in California in 1952.
| March 1970 | Oceanroutes Japan is established in Minato-ku, Tokyo as a subsidiary of U.S.-based Oceanroutes (established 1967). |
| May 1984 | Start of comprehensive disaster-prevention weather consulting service for local governments. |
| June 1986 | Land and airline departments develop into independent subsidiaries of Oceanroutes, and Weathernews is established. |
| March 1988 | Weathernews America is established. |
| November 1988 | Start of Japan's first lightning information service, with a lightning position evaluation network created to cover the Kanto, Koshinetsu and Tohoku regions of Japan. |
| April 1990 | Weathernews Makuhari General Service Center opens in Makuhari, Chiba. |
| October 1993 | Takeover of Oceanroutes, world's largest ocean weather information company. |
| February 1999 | Start of "WNI Weather Information・(now "Weathernews・ service for NTT DoCoMo i-mode. |
| October 2000 | Start of "Weathernews・channel (channel 744) on SKY PerfecTV!. |
| December 2000 | Start of "Weathernews・BS digital data weather channel (channel 910). Listed on Osaka Securities Exchange NASDAQ Japan (standard). |
| November 2000 | BV Weerbureau HWS (established through the privatization of the commercial department of the Dutch government's weather agency) is acquired as a subsidiary via stock acquisition. Number of shares per unit is changed from 1,000 to 100. |
| May 2002 | Support for weather-related administrative and response measures at 2002 FIFA World Cup soccer stadiums in Japan. |
| March 2002 | Start of "Weathernews・weather information content for E-Plus cellular phone users in Germany. |
| April 2002 | Start of weather information content in NTT DoCoMo i-mode format for KPN cellular phone users in the Netherlands. |
| March 2003 | Weathernews Shanghai Co., Ltd. is established in China. |
| May 2003 | Transport weather business support agreement is signed with American Airlines. |
| November 2003 | Listed on the first section of the Tokyo Securities Exchange. |
| December 2003 | Start of content for three major cellular phone carriers in the U.S. |
| January 2004 | Weathernews supports weather information for NTV's "Hakone Ekiden・program. |
| January 2004 | Local subsidiaries are established in Italy |
| March 2004 | Start of weather information for 7-ELEVEN Taiwan. |
| March 2004 | Local subsidiaries are established in Spain |
| April 2004 | Start of weather information for China Mobile, major mobile communications company with 70% share of China market. |
| April 2004 | Start of "Weathernews,・first weather channel on "EZ Channel・for au cellular phone users |
| April 2004 | Start of "Travel Weather Advisor・cellular phone site providing individually-tailored weather advice for Japanese Golden Week holiday. |
| May 2004 | Weather information for i-mode service of major Italian communications provider WIND. |
| May 2004 | One million mobile supporters (paid subscribers) are logged. |
