Issue Information

Front cover: Organoids are miniaturized organs cultured in vitro. There are great expectations for its potential, including understanding of the mechanism of organ development, construction of disease models, search for new drugs, and application to regenerative medicine. Now, balloons imitating organoids are flying over the city one after another to announce the advent of a new era. The row of the buildings on the lower right looks like intestinal absorptive cells and Paneth cells lined up. For drawing the balloons, we referred to the following papers: From left, cerebral neocortex (Seto and Eiraku (2019) Neurosci. Res . 138, 33‐42), intestine (Lancaster and Knoblich (2014) Science 345, 1247125), and optic cup (Sasai et al . (2012) Development 139, 4111‐4121).