In my experience the prediction on computers and smartphones is very good for everyday use when inputting Japanese. You do have to make choices of what kanji t

In my experience the prediction on computers and smartphones is very good for everyday use when inputting Japanese. You do have to make choices of what kanji to use but often you're aware of the homophone confusion as you write (think about writing "they're", "their" and "there") so it's easy to get the hang of.