By the Muromachi period almost all houses were built facing a street, and thereby areas on both sides of a street began to constitute a 'machi' (Both-side town (Ryogawa machi)).
室町時代にはほぼすべての建物が間口を通りに向ける形になり、同じ通りの両側の地域が一つの「町」を形成するようになる（両側町）。