"A joint study by Kyoto University and Kajima Corporation, ‘Artificial Gravity Habitats on the Moon and Mars,’ was announced in 2022. The study identified and developed three essential components for living in space: artificial gravity, a confined ecosystem, and a transportation system with artificial gravity," the document stated.
The research will be focused on the following stages: assessing the technical feasibility of the structure and construction of facilities, their suitability for human life, assessing the impact on human health, as well as creating closed ecosystems with the aim of their further use in creating facilities for living on the Moon. The statement also said that one of the aims of the study is to begin creating such an object on Earth.