Examples of the sulfamoyl group include a dimethylsulfamoyl group and a di-(2-hydroxyethyl)sulfamoyl group. [0120] The dye of formula (1) for use in the ink set of the present invention particularly preferably has a structure represented by the following formula (2): [0121] In formula (2), R1, R2, R5 and R6 have the same meanings as in formula (1). [0122] R3 and R4 each independently represents a