At present, the Japanese municipal solid waste management system largely relies on incineration. Mainly the combustible waste is incinerated, the incombustible waste is landfilled. However, the amount and composition of combustible waste has been changed in recent years by implementation recycling, and the ratio of kitchen waste in combustible waste has been higher, leading to a trend of lower heating of combustible waste and the current deficiency of poor heat recovery in incineration. In addition, the organic loading to final disposal sites from organic matters in the incombustible waste is a serious problem. Considering Kitahiroshima city as the case study area, this study attempts to improve the property of combustible waste and loading of the final disposal site with mechanical-biological treatment (MBT), and evaluated the feasibility of MBT in Kitahiroshima city. As a result, this study showed that MBT could improve the property of the combustible waste and the loading of final disposal site. Meanwhile, the financial cost of MBT scenario is lower than that of regional incineration. Therefore, Kitahiroshima city has potential to introduce MBT.