In Chapter 2, “Platform genealogies,” we consider the continuities and discontinuities around LINE, WeChat, Facebook and WhatsApp as a digital genealogy. We explore the particular histories and practices informing those platforms—what Gillespie (2015) calls “the politics of platforms” or Lamarre calls (2017) “platformativity”—and why they are being adopted intergenerationally. For example, the developed and quick uptake of LINE was in direct response to the way in which mobile social media shifted in and after the earthquake, tsunami and Fukushima nuclear disaster of 2011 known as 3/11.