Gas-liquid mixing at extraordinarily large gas flow rates was investigated for a pitched blade paddle creating upward flow in comparison with the Rushton turbine and Scaba SRGT impellers, which are commonly used for gas-liquid mixing. As a result, it was found that, by dispersing gas from a ring sparger set above the impeller against the flow created by the pitched blade paddle, flooding does not occur and the aerated power hardly decreases even at 25 vvm. The correlation of Froude number with gas flow number at the flooding-loading transition was derived for large gas flow rates.