The JMA model has been changed from GEPS to CPS coupled to an ocean model since the 19^th February 2023  with the main changes related to S2S outputs:

• General changes:
  
  • output frequency for 10 metre wind and precipitation changed from 24 to 6-hourly
  • increased number of vertical layers for  vertical velocity
  • surface thermal radiation downwards parameter newly provided
• Real-time forecasts changes:
  • ensemble size decreased from 25 to 5
  • frequency changed from twice a week (every Tuesday and Wednesday at 12Z) to every day (0Z)
• Reforecasts changes (the new corresponding fixed reforecast set with model version date 30/09/2022 will be added in the near future):
  
  • ensemble size decreased from 13 to 5
  • the start dates changes as per JMA Model#CPS3

More information can be found in:

• JMA Model
  • JMA model detailed description
• Provided parameters
• S2S Models