If you’ve seen this movie twice then technically one does not need subtitles to watch it at home because you are already fully aware of the story beats, character arcs and emotional highs.
I actually prefer this way going forward because it will give a very clean aesthetic look to the movie where there is only Japanese dialogue with no subtitles and yet you will still know the story and that sounds like a great way to watch this.
Think about that for a second.
You really REALLY don’t need the safety net of the subtitles any longer after the second viewing with subtitles which obviously is very important to have on your first two viewings.
The important thing here is that you definitely had to have watched this movie at least once with subtitles or you’re screwed if your first viewing is without lol