Some topic covered in this (I don't speak Japanese but I can speak math): -Some mathematical preliminaries (matrix math, vector math) -Kinematics (Newton's 3rd law, air resistance) -Galilean relativity -Celestial mechanics (Kepler's 3rd law, Newtonian gravity) -Work and energy -A little bit of vector calculus -Special relativity (Maxwell's equations, time dilation and length contraction, Lorentz transformations, mass-energy equivalence) -General relativity (stress-energy tensor, spacetime metrics, some tensor math, Christoffel symbols, Riemann and Ricci tensors, Einstein field equations, Schwarzschild metric/black holes)
Wish there was a bit more discussion on electromagnetism but this is still great.