[beta]-1,3-1,6-glucan powder, glucan-containing composition, method for manufacturing [beta]-1,3-1,6-glucan, inclusion complex, method for manufacturing inclusion complex, and method for recovering guest molecule

Provided are a [beta]-1,3-1,6-glucan powder having high solubility in water, and a glucan-containing composition in which the powder or the like is used, a method for manufacturing a [beta]-1,3-1,6-glucan powder, an inclusion complex, a method for manufacturing an inclusion complex, and a method for recovering a guest molecule. A [beta]-1,3-1,6-glucan powder having a saturated solubility in water of 1.0 to 20.0 mass%. A [beta]-1,3-1,6-glucan powder in which, in the particle diameter distribution of the [beta]-1,3-1,6-glucan measured by dynamic light scattering measurement, the particle diameter for the peak representing the largest volume fraction is in the range of 5 to 15 nm, and the volume fraction of a peak outside the particle diameter range of 5 to 15 nm is 30% or less of the volume fraction of the peak having the largest volume fraction.