  COVID-19 epidemics in Japan and Tokyo were analyzed by a fundamental equation
of the dynamic phase transition. As a result, the epidemic was found to be in
good agreement with the random nucleation and linear growth model suggesting
that the epidemic between March 13, 2020 and May 22, 2020 was simply
rate-limited by the three constant-parameters: the initial susceptible, domain
growth rate, and nucleation decay constant. This model provides a good
predictor of the epidemic because it consists of one equation and the initial
specific plot is linear.
