We have proposed the reactive templated grain growth (RTGG) method, in which highly textured ceramics are fabricated by the reaction between aligned template particles and complementary reactant materials at the first stage and successive grain growth during the second stage of heat treatment. A regular perovskite-type structured Bi_0.5(Na, K)_0.5TiO₃ (BNKT) bulk ceramic with a preferred <100> orientation was prepared by using Bi₄Ti₃O₁₂ (BiT) platelets as a reactive template. The textured BNKT ceramics exhibited higher piezoelectric properties than randomly oriented ceramics with the same composition. The proposed method has been extended to other systems with bismuth layer-structured ferroelectrics as well as regular perovskite-type piezoelectrics and dielectrics.