We've received several reports of this (and very recently in the chatbox too!) so it wouldn't make any sense for us not to make a post about it!
The popularity of Taiko no Tatsujin+ in Japan is undeniable, and it is one of the top apps downloaded too. So it would make sense to create a more authentic controller for the app to make it even more fun!
A Bluetooth version of Namco's Tatacon is now available for the smartphone/tablet version of Taiko, and since it doesn't connect to a console like the PS2 or to the Wiimote, it requires its own power; three AA batteries. It's not cheap however; one of these cost 8700 yen, or the equivalent of two Wii games.
The first 2000 customers get this adorable Don-chan cover for their Tatacon, along with hands to hold their sticks!