Near- and mid-infrared wavelength ranges include absorption features due to interstellar ices (e.g., H2O ice at 3.05 micron and CO2 ice at 4.27 micron) which are important probes of the interstellar environment. Among them, CO2 ice is the most important one because CO2 ice is thought to be a secondary product unlike H2O ice which is primarily formed on dust grains. Therefore, a CO2/H2O ice abundance ratio effectively reflects the ice-forming interstellar environment. In the ice study, CO2/H2O ratios in our Galaxy and the Magellanic Clouds have been intensively observed to date, which show large variations from object to object. The cause of the large variations is, however, still under debate. In this presentation, we report CO2/H2O ratios in nearby galaxies based on the AKARI near-infrared (2.5-5.0 micron) spectra for 158 galaxies. The CO2/H2O ratios in our sample are in a range of 0.05-0.30. We find a positive correlation between the CO2/H2O ratios and the Br alpha/PAH 3.3 micron ratios, indicating that hard UV radiation due to massive stars is important to enhance the CO2/H2O ratios. Furthermore, we find a positive correlation between the CO2/H2O ratios and the specific star formation rates of the galaxies, suggesting that the evolutionary stage of a galaxy is also an important factor to determine the CO2/H2O ratio of a galaxy. Based on the results, we discuss implications of the variations in CO2/H2O ice abundance ratios for the ice-forming interstellar environment and the galaxy evolution.