Oh, then I think you probably won't like Meiji's milk chocolate.
They have a dark chocolate version, but I've not tried it
before...
Have you tried their 99% dark chocolate yet? 
It's inedible. 
But still... no harm giving the milk chocolate a try - you might
end up being a fan!
mooku, i have tried meiji's dark choc, not to my liking, too
mild.
If you wanna go for dark choc, percentage should be around
70%+. Have heard recommendation from expert on the
exact percent but not sure now cos can't remember.