Two bows, two claps, one bow
The practice of "two bows, two claps, one bow" can be traced back to the "Shrine Festival" in 1873, where it was referred to as  Over time, different methods were developed and refined, resulting in the current etiquette. In the 40th year of the Meiji era, the "Shrine Rituals and Events Etiquette" was established, which defined the etiquette as "returning, clapping twice, pressing together, praying, praying, clapping twice, and bowing again."