5 June 2018:
JMA began the operation of a new supercomputer system. See http://www.jma.go.jp/jma/en/News/JMA_Super_Computer_upgrade2018.html for details
18 October 2018:
JMA enhanced the usage of the clear-sky radiance (CSR) data from geostationary satellites (i.e. Himawari-8, Meteosat-8, 11 and GOES-15) in JMA’s global NWP system at 00 UTC on 18 October 2018. In detail, there were two major updates:
(1) JMA began assimilating surface-sensitive CSR data from Himawari-8 Band 9 and 10 and Meteosat-8, 11 Channel 6.
(2) JMA began assimilating hourly CSR data from Meteosat-8, 11 and GOES-15 by stopping thinning data every two hours. (Note: Hourly CSR data from Himawari-8 have been already used since March 2016.)
The amount of CSR data assimilated into the JMA’s global NWP system became about double by these updates.