I prefer to say that before anyone post a thread about it but we're not looking to track Ninji Speedruns here since they change every 7 days (so no permanent) and there's already a "leaderboard" integrated to it.

Update: Well apparently you can redo the levels at any time on the Ninji Mode. However, that's change nothing about not being tracked on the site. Nintendo track the times anyway so there's no need for a leaderboard here.