Introduction to Sanjusangen-do: Sanjusangen-do is also called Rengeo-in. Its main hall with a length of 120 meters from north to south is one of the longest wooden buildings in Japan because the main hall consists of 33 columns. Named after separation. With the seated statue of Thousand-Armed Guanyin, a national treasure, at the center, and 500 standing statues of Thousand-Armed Guanyin sitting on the left and right, the presence and majesty of the statue are so overwhelming that you can't help but hold your breath.