For those of you who are not familiar, Taiko no Tatsujin is a Taiko Drum rhythm game made by Namco that involves the simulation of playing the drums to the beat of the music. In osu!, beatmaps can be played in the styling of Taiko no Tatsujin through use of the Taiko mod. Like basic osu!, there are three elements of gameplay:
1 - the standard beat. This will appear as either a reddish orange or a pale-blue circle. If it is a reddish orange circle, you must press one of the buttons bound to the inner portion of the Taiko drum (left mouse button, or alternatively, one of the keys configured in the options menu which is displayed at the start of the map in the upper left). For blue notes, you must press the right mouse button or one of the keys for the outer ring of the drum. The notes must be pressed when they reach the small circle next to the drum in the status bar on the playfield.
If the note is a LARGE circle, you may press BOTH of your inner or outer drum keys depending on the colour of the note for additional points.
2 - Drumrolls. These appear as yellow bars. You gain points for playing notes to the beat of the song.
3 - Dendens. These appear as spinners, with a countdown displaying the time you have remaining to clear it. You must press the keys for Orange and Blue in alternation until the Denden is clear.
The default controls for the Taiko mod are:
Orange: Left Mouse, X, C
Blue: Right Mouse, Z, V
you may configure the keyboard buttons as you see fit from the Input tab in the Options menu.
Note: the position of your osu! cursor does not matter when playing beatmaps with the Taiko mod.
1 - the standard beat. This will appear as either a reddish orange or a pale-blue circle. If it is a reddish orange circle, you must press one of the buttons bound to the inner portion of the Taiko drum (left mouse button, or alternatively, one of the keys configured in the options menu which is displayed at the start of the map in the upper left). For blue notes, you must press the right mouse button or one of the keys for the outer ring of the drum. The notes must be pressed when they reach the small circle next to the drum in the status bar on the playfield.
If the note is a LARGE circle, you may press BOTH of your inner or outer drum keys depending on the colour of the note for additional points.
2 - Drumrolls. These appear as yellow bars. You gain points for playing notes to the beat of the song.
3 - Dendens. These appear as spinners, with a countdown displaying the time you have remaining to clear it. You must press the keys for Orange and Blue in alternation until the Denden is clear.
The default controls for the Taiko mod are:
Orange: Left Mouse, X, C
Blue: Right Mouse, Z, V
you may configure the keyboard buttons as you see fit from the Input tab in the Options menu.
Note: the position of your osu! cursor does not matter when playing beatmaps with the Taiko mod.
it's basically Donkey Konga then ? 
i'l download it right away then , love donkey konga :p It's what got me into trying rythm games in the first place.