More than 150 years have passed since the start of the gas business in Japan, and with the advancement of technology, gas has now become indispensable for making our lives comfortable and convenient. Furthermore, in recent years, fuel cells and high-efficiency water heaters have become more widespread, contributing to energy conservation and CO2 reduction in our daily lives. On the other hand, it is self-evident that the more gas is used, the more various opinions from users will increase. In recent years, there has been a movement for individuals to express their opinions on social media and other online platforms in an attempt to solve problems. The purpose of this study is to develop a new tool to visualize online opinions about gas, which has become increasingly used, and to provide information that will help gas utilities in their improvement activities quickly and simply.