Black toner containing compound having azo skeleton

A black toner, comprising toner particles, each of which contains

• a binder resin,
• a compound and
• a carbon black, wherein:
• the compound has a structure of which a polymer portion having a monomer unit represented by the Formula (2) is bound to a structure represented by Formula (5);
• in Formula (5),
• R1 each independently represents a hydrogen atom, a halogen atom, an alkyl group, an alkoxy group, a trifluoromethyl group, a cyano group, or a hydroxyl group,
• R9 and R10 independently represent an alkyl group, a phenyl group, an OR4 group, or an NR5R6 group;
• R4 to R6 independently represent a hydrogen atom, an alkyl group, a phenyl group, or an aralkyl group,
• R24 to R28 independently represent a hydrogen atom, a COOR21 group, or a CONR22R23 group;
• R21 to R23 each independently represent a hydrogen atom or an alkyl group,
• l is 4, and
• L represents a divalent linking group that binds to the polymer portion, and
• in Formula (2),
• R7 represents a hydrogen atom or an alkyl group, and R8 represents a phenyl group, a carboxyl group, a carboxylic acid ester group, or a carboxylic acid amide group