When promoting projects for converting biomass into energy, the choice of technologies to develop and implement depends heavily on the conditions of the target region. In developing countries, equipment and catalyst costs tend to be relatively high. For example, even if the catalytic performance is slightly lower, utilizing a lower-cost catalyst would be economically advantageous. Developing technologies from the perspective of "appropriate technology" like this can facilitate the introduction of new technologies in developing countries and contribute to achieving the Sustainable Development Goals (SDGs).