  We develop an effective-field-theory (EFT) framework for inflation with
various symmetry breaking pattern. As a prototype, we formulate anisotropic
inflation from the perspective of EFT and construct an effective action of the
Nambu-Goldstone bosons for the broken time translation and rotation symmetries.
We also calculate the statistical anisotropy in the scalar two-point
correlation function for concise examples of the effective action.
