Genpei Ponds (see below) and the catalpas next to the Museum of Modern Art represent respectively Seiryū and Byakko. In spite of all the changes the shrine has gone through over the years, in this respect Yoritomo's design is still basically intact. There is a 1.8 km straight street in the front of shrine, called "Wakamiya Ōji (若宮大路)". It is the approach (sandō (参道)) of Tsurugaoka Hachiman-gū, there are three big Torii (Shinto gate). The Torii gate farthest from the shrine is called Ichi-no-Torii (the first torii), the one in the middle is Ni-no-Torii (the second torii) and the one in front of the shrine is San-no-Torii (the third torii). As one enters, after San-no-Torii (the third torii) there are three small bridges, two flat ones on the sides and an arched one at the center. In the days of the shogunate there used to be only two, a normal one and another arched, made in wood and painted red. The shōgun would leave his retinue there and proceed alone on foot to the shrine. The arched bridge was called Akabashi (Red Bridge), and was reserved to him: common people had to use the flat one. The bridges span over a canal that joins two ponds popularly called , or "Genpei ponds". The term comes from the names of the two families, the Minamoto ("Gen") and the Taira ("Pei"), that fought each other in Yoritomo's day. The stele just after and to the left of the first torii explains the origin of the name: The Genpei Ponds The Azuma Kagami says that "In April 1182 Minamoto no Yoritomo told monk Senkō and Ōba Kageyoshi to have two ponds dug within the shrine." According to another version of the story, it was Yoritomo's wife Masako who, to pray for the prosperity of the Minamoto family, had these ponds dug, and had white lotuses planted in the east one and red ones in the west one, colors which are those of the Taira and Minamoto clans. From this derives their name. The red of those lotuses is supposed to stand for the spilled blood of the Taira. Sub-shrines and infrastructures Tsurugaoka Hachimangū includes several sub-shrines, the most important of which are the Junior Shrine () at the bottom, and the Senior Shrine () 61 steps above. The present Senior Shrine building was constructed in 1828 by Tokugawa Ienari, the 11th Tokugawa shōgun