The largest nagadou taiko, with a diameter over 36 inches. Some Odaiko can be 6 feet or more in diameter! These are the drums made famous by "Kodo" and "Ondekoza," Japan's premier taiko groups. Taiko groups will sometimes paint a "mitsudomoe" (3 sided "ying/yang" symbol) on the O-daiko skins. O-daiko are played on stands in a horizontal position ("kagami uchi"), often with a drummer on each side of the same drum.