Silver halide color photographic light-sensitive material and image formation method using the same, silver halide emulsion, reducing compound having group adsorptive to silver halide and method for producing the same

A silver halide color photographic light-sensitive material comprising at least one compound represented by the following Formula (IV):

• X-(L1′)n-Y3 Formula (IV)
• wherein:
• X represents one of a five-, six- or seven-membered heterocycle having, as constitutents of its ring structure, three or more heteroatoms;
• a five-, six- or seven-membered heterocycle which has a quaternary nitrogen atom and is represented by the following “a”;
• a five-, six- or seven-membered heterocycle which includes nitrogen and has a thioxo group and is represented by the following “b”;
• a five-, six-, or seven-membered heterocycle which includes nitrogen and is represented by the following “c”;
• and a five-, six-, or seven-membered heterocycle which includes nitrogen and is represented by the following “d” or “e”
• wherein Z represents an atomic group required to form a nitrogen-containing five-, six-or seven-membered heterocycle;
• R1 represents an alkyl group, an alkenyl group or an alkynyl group;
• L1, and L2 respectively represents a methine group;
• and n2 represents 0, 1 or 2,
• n denotes an integer of 0 or 1;
• L1′ represents a divalent connecting group, provided that the atom of L1′, which is directly connected to Y3, is a carbon atom;
• Y3 is any group selected from the groups represented by the following (B1), (B2) or (B4);
• and Rb1, Rb2 and Rb3 in the groups represented by the following (B1), (B2) or (B4) respectively denote one of a hydrogen atom, an alkyl group, an alkenyl group, an alkynyl group, an aryl group and a heterocyclic group, provided that when Y3 is a group represented by (B1), n is 1 and L1′ is a heterocyclic group having a divalent carbon atom directly connected to Y3, and when Y3 is a group represented by (B2) and Rb1 is a hydrogen atom, n is 1 and L1′ has a carbon atom which is directly connected to Y3, which carbon atom is part of an alkylene group or —CO— in L1′