Abstract
The author has demonstrated that the level of IT investment is not correlated with the level of organisational IQ based on the empirical data of Japanese firms. When the relationship is assumed as causal, the former being the independent variable while the latter the dependent, however, the variance will be considered to be large. Thus some firms obtaining extremely good returns from their IT investments in terms of improve organisational IQ. The article speculates on how to improve the organisational IQ via IT investments.