The transformations in the energy sector today bring new technologies and a shift towards the distributed generation. Among the others, miniaturized hydropower technologies are now emerging. Their progressive compactness, efficiency, and ease of implementation seem to fit the context of key Asian urban forms today, where 'in-situ urbanization' -thus population densities and infrastructure of a diffused kind, including electric networks- mixes with wet agriculture -thus precipitations and organized hydrologic systems. In this context, a public initiative of distributed generation by technologies of the sort may be beneficial. Indeed, these technologies are adequate for the diffuse electric demand and sustain the even development of the territory. Anyway, the technologies locally available may have different performances from the global state of the art of technology. Not only but also, the availability of space for a public initiative of the kind may not comply with the spatial requirements of the available technologies, despite their miniaturization. In light of this, the paper suggests that the available technologies, their actual requirements of space, and the land subdivision can offer severe constraints to such an initiative. Thus, they represent aspects that participate in shaping the prospects of Asian urbanization. In particular, the discussion elaborates on an investigation developed in the context of a pertinent case study, i.e., the Taipei-Kaohsiung Mega Urban Region.