Out of context, I wouldn't have known how to say it.
But I can pronounce a fair few Japanese names and think I'd get it right now I know that's the origin.
Will the DC's surname be Japanese too? Because then people will generally come across it in context and there might me more who say it correctly. And of course people who actually know your DC will learn how to pronounce it.
But, you'll probably have to tell an awful lot of people when you first meet them. And the DC will have to learn to listen out for likely mispronunciation (eg in waiting rooms or anywhere else you might be called formward by name). Then again, lots of people with names from areas other than Western Europe manage those things.