And,
-right click the ibus icon on the task bar
-select "Preferences" on the menu
-"iBus Preferences" window shows up , and click "Input Method" tab.
- then , input methods list appears .
and if you can not see "Japanese-Anthy" on that list,
press "Add" button ,
select "japanese" ,
and then select "Anthy" ,
then Japanese-Anthy should be added on the Input Method list.
Indeed this nailed it. I don't know how I missed Anthy the first time to be honest. Anyway, set up now and can do Japanese input -- thanks!
Mark