Can someone help me with my Japanese keyboard I put on my iPad?

Some characters are missing >_< I'll type them all:
あかさたないきしちにうくすつぬえけせてねおこそとのはまやらわ「ひみりをふむゆるんへめれーほもよろ
That's all (besides punctuation). I know there are more. Can someone help? =>_<= acak pic.