Grain oriented electrical steel sheet for wound core and wound core

A slab having a predetermined composition is heated to 1280 DEG C or more. The slab is hot-rolled to obtain a hot-rolled steel sheet. The hot-rolled steel sheet is annealed to obtain an annealed steel sheet. The annealed steel sheet is cold-rolled to obtain a cold-rolled steel sheet. The cold-rolled steel sheet is decarburization annealed to obtain a decarburization annealed steel sheet. The decarburization annealed steel sheet is coiled in a coil state. The coil-state decarburization annealed steel sheet is finish-annealed. The cold-rolled steel sheet is heated to a temperature of 800 DEG C or more at a rate of 30 DEG C/sec or more and 100 DEG C/sec or less during increasing temperature of the cold-rolled steel sheet in the decarburization annealing or before the decarburization annealing. The decarburization annealed steel sheet is heated at a rate of 20 DEG C/h or less within a temperature range of 750 DEG C or more and 1150 DEG C or less during increasing temperature of the decarburization annealed steel sheet in the finish annealing.