Takashi Sawanaka will make his “JP” fork to the next official WinMerge version. He released a first experimental version with the number 2.15.2:

https://sourceforge.net/projects/winmerge/files/alpha/2.15.2/

Here are some notes about release and a plan for the stable version 2.16.0:

https://bitbucket.org/winmerge/winmerge/issues/84/