I can toggle between languages but can't change the Input Method to Kanji, Kana or Katakana.
All tutorials and instructions says that after selecting Japanese Microsoft IME you only need to click on the "A" to toggle between Romaji/Kanji/Kana/Katakana or use one of many keyboard shortcuts, but they do nothing. If you right click on it to see all the options it's all in japanese and any change you make neither gets applied or saved (you may open the context menu again and everything will be just as before).
If you try to go to Settings->Time and Language->Region and Language->Japanese (Options)->Microsoft IME (Options) the Metro App WILL CRASH and close.
This is the same for the non-metro Control Panel. Control Panel->Language->Japanese (Options)->Microsoft IME (Options) and a window will open and close immediately.
The Metro App is the only one that registers an Error Event on the Event Viewer
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
<System>
<Provider Name="Application Error" />
<EventID Qualifiers="0">1000</EventID>
<Level>2</Level>
<Task>100</Task>
<Keywords>0x80000000000000</Keywords>
<TimeCreated SystemTime="2016-11-30T23:52:56.199552100Z" />
<EventRecordID>11396</EventRecordID>
<Channel>Application</Channel>
<Computer>*******</Computer>
<Security />
</System>
<EventData>
<Data>SystemSettings.exe</Data>
<Data>10.0.14393.82</Data>
<Data>57a55dc6</Data>
<Data>Windows.UI.Xaml.dll</Data>
<Data>10.0.14393.351</Data>
<Data>5801a795</Data>
<Data>c000027b</Data>
<Data>00000000006d714b</Data>
<Data>c20</Data>
<Data>01d24b64d2be345c</Data>
<Data>C:\WINDOWS\ImmersiveControlPanel\SystemSettings.exe</Data>
<Data>C:\Windows\System32\Windows.UI.Xaml.dll</Data>
<Data>a94b04f8-b8d2-42f5-9a6f-8b79434abaf1</Data>
<Data>windows.immersivecontrolpanel_6.2.0.0_neutral_neutral_cw5n1h2txyewy</Data>
<Data>microsoft.windows.immersivecontrolpanel</Data>
</EventData>
</Event>
Windows Edition: Windows 10 Home Single Language (it may be this?)
Version: 1607
Build: 14393.447