Artist Kyohei Sakaguchi documented original architecture of Japan’s poorest, calling it a series of “Zero Yen Houses”. He writes:
But I don’t call them “homeless”. Because They have a house. I rent a house now and don’t have a house. In that sense, I may be a homeless. From that viewpoint, I think they are very smart.
One of those is a Solar Zero Yen house, and it clearly belongs to this collection.
https://www.0yenhouse.com/en/A_Solar_Zero_Yen_House/index.html