Japan Foundation

Do communities struck by disaster build back better, or not? Recent small- and medium- N studies have shown mixed effects. This mixed-methods study tests the effect of disasters on the adoption of solar power as a key form of building back better and adapting to climate change. To test this effect, we applied a large- N longitudinal matching experiment on cities affected and unaffected by disaster paired with qualitative case studies, focusing on the 2011 triple disaster in Japan and Hurricane Sandy in 2012 in the United States. We find that disaster-hit cities adopt more solar farms and rooftop solar than cities unaffected by crisis and that the social capital of these disaster-hit communities shapes their adoption patterns. By clarifying the effects of disasters on the build-back-better phenomenon in comparative cases, this article aims to guide recovery priorities after large-scale shocks.

Abstract Gas hydrates in sediments are forecast to become an unconventional natural gas resource. In 2013 and 2017, an offshore natural gas production test in subseabed gas hydrate‐bearing sand layers was carried out in the eastern Nankai Trough area of Japan. However, permeability evolution with progressive shearing of these faulted reservoirs has remained enigmatic. It is necessary to understand fault behavior under shear, as well as how normal stress affects permeability evolution. Here, we examine the relationship between fault development and permeability reduction in unconsolidated turbidite sandy sediment from Japan's eastern Nankai Trough area using a laboratory ring‐shear experiments. At each stress condition, the permeability decreased significantly following shear displacements of ~0.2–0.5 m, gradually decreasing further with shear displacements up to 10 m. Permeability after shearing was reduced by 3 to 4 orders of magnitude compared to that before shearing. Grain crushing and compaction within the shear zone and surrounding host sediment are dependent on stress and mineralogy. The findings of the role of shear zone development in modifying fault permeability for turbidite sand are expected to contribute directly to rational evaluation of gas‐hydrate reservoir, production simulations, and development strategies in future studies.

Recent evidence suggests that bone marrow-derived cells may contribute to repair and lesion formation following vascular injury. In most studies, bone marrow-derived cells were tracked by transplanting exogenous cells into bone marrow that had been compromised by irradiation. It remains to be determined whether endogenous circulating progenitors actually contribute to arterial remodeling under physiological conditions. Here, we established a parabiotic model in which two mice were conjoined subcutaneously without any vascular anastomosis. When wild-type mice were joined with transgenic mice that expressed green fluorescent protein (GFP) in all tissues, GFP-positive cells were detected not only in the peripheral blood but also in the bone marrow of the wild-type mice. The femoral arteries of the wild-type mice were mechanically injured by insertion of a large wire. At 4 wk, there was neointima hyperplasia that mainly consisted of alpha-smooth muscle actin-positive cells. GFP-positive cells were readily detected in the neointima (14.8+/-4.5%) and media (31.1+/-8.8%) of the injured artery. Some GFP-positive cells expressed alpha-smooth muscle actin or an endothelial cell marker. These results indicate that circulating progenitors contribute to re-endothelialization and neointimal formation after mechanical vascular injury even in nonirradiated mice.

The Local Politics of Kyoto. By Teruo Gotoda. Berkeley: University of California, Institute of East Asian Studies, Center for Japanese Studies, 1985. (Japan Research Monograph 7.) xii, 161 pp. Glossary, Notes, Bibliography, Index. $15 (paper). - Volume 45 Issue 4