Method for producing silica microcapsule

A method for producing a silica microcapsule having a shell containing silica as a constituent component and a core containing one or more organic compounds inside the shell, the method comprising:

• subjecting an emulsified liquid obtained by emulsifying an aqueous phase component containing a cationic surfactant and an oil phase component containing one or more organic compounds and a silica source to a sol-gel reaction in the presence of one or more sulfur-containing ions selected from the group consisting of a sulfate ion, a sulfite ion, and a sulfonate ion to form the silica microcapsule, and
• a molar ratio of the total molar amount of the sulfur-containing ions to the molar amount of the counter ions of the cationic groups of the cationic surfactant [(sulfur-containing ions)/(counter ions of cationic groups)] is 0.01 or more and 2 or less.