[Problem]To provide a GPR40 activating agent having, as an active ingredient, a novel compound having a GPR40 agonist action, a salt of the compound, a solvate of the salt or the compound, or the like, particularly, an insulin secretagogues and a prophylactic and/or therapeutic agent against diabetes, obesity, or the like.[Means of solving the problem]A compound of Formula (III): (where f is 0 to 2; g is 1 to 4; j is 0 to 3; k is 0 to 2; n is 0 to 2; p is 0 to 4; h is 0 to 3; q1 id 0 to 3; q2 is 0 or 1; r1 is 0 to 2 (with the proviso that q1+q2+r1 is 0 to 5); J1a is —CR11a—, N; J2 is —CR12aR12b—, —CR12c—; T is —CH2—, O, —S(O)i— (i is an integer of 0 to 2) or —NR7—; X is O, S, or —NR7—; ring A′″ is a benzene ring, a pyridine ring; ring B′ is a benzene ring, a pyridine ring, a pyrimidine ring; and R1 to R14 are specific groups), a salt of the compound, or a solvate of the salt or the compound.