This research investigated the applicability of mobile off-grid architecture (MOA) to regional revitalization by using Jobs Theory to evaluate the product–market fit of EcoCabin, a prototype MOA developed by the author. In recent years, MOA has found increasing applications at the local level in Japan. However, the specific needs that MOA meets remain unclear. To help fill this gap, a research team composed of the author, who is an assistant professor at Chiba University, a researcher, and students from multiple departments of the university was formed to assess the product-market fit for EcoCabin. To make the assessment, members of the research team interviewed five potential EcoCabin users in Nagara Town, Chiba Prefecture. The interviewed group comprised two farmers, a resort facility operator, the farmers’ market manager, and a tourist farm owner. In the evaluation process, the needs of the interviewees were ascertained, and remaining issues were identified. The value proposition of EcoCabin was then assessed. The results suggest that using MOA to induce communications among people, especially those living in rural areas, could be an effective contributor to regional revitalization. However, further research will be necessary to verify the product’s compatibility with the market.