The Japan Meteorological Agency has been operating a telecommunication system to fulfill the functions required for a Regional Telecommunication Hub (RTH) of the Global Telecommunication System (GTS) within the framework of WMO. RTH Tokyo was designated by WMO in 1967; since then, the number of GTS circuits connected with RTH Tokyo has grown to ten, and their transmission rates and protocols have been upgraded gradually.

Status of Regional Meteorological Telecommunication Network (RMTN) for Region II is here.
RTH Tokyo welcomes suggestions for status changes from the National Meteorological Centers concerned.
The specifications of current GTS circuits connected with RTH Tokyo are shown here.