According to the shrine's records, the shrine started off when people who moved from Shinshu-Takanashikyo to Kamogawa during the Nanbokucho period relocated a part of the spirit of Suwa Shrine. It is a shrine whose facilities were developed, including the shrine pavilion which was built in 1779, during the late Edo Period, when creating new rice fields were a boom. As for the parade floats, they purchased Kanda's floats which entered into Chiyoda Castle during the festival. It is inside the cover roof and cannot be seen from the outside, but the kohai-ryu (flying dragon) of the shrine is a work by Ihachi the First. Unfortunately it was recently plastered in cement, but other sculptures such as the tapir are also likely to be by Ihachi.

It is known that there were five tumuluses (burial mounds) on the sand hills of Ushirohiroba. Of these, the one that can be currently recognized as a mound is only Ushirohiroba tumulus No.2. It is quite large for a tumulus cluster, being a 70-tatami-matt area of round barrow. The Okutsu Castle - built on a site where the coastline and the paddy fields in Tojo can be overlooked - belonging to "The King of Nagasa" can also be seen. It shows that the rice fields and marine passages in Tojo were developed early on in history, and that many wealthy families were expanding in the area. The boat-shaped stone coffin uncovered from tumulus No.1 during civil engineering work is rare.

The jori system is a land division plan for rice fields etc. made to organize and manage the blocks of rice fields provided by the government in Nara Period. Currently, they are named separately "the site of Negatauenoshiba-jori" and "the site of Nakahara-jori" as a matter of practical convenience, but it reveals that neatly divided rice fields had been spread in the whole Tojo area ever since the Nara Period. The sight of rice fields spreading as far as one can see is a scene strongly lined by history since the Nara Period. Archeological investigations associating with farm land consolidation, have uncovered remains of what can be thought of as an administrative institution of that period.

From the archeological and monument distribution research results, it can be estimated that people who farmed the jori lands lived in nearby small cultivated land areas surrounding the jori lands. Because when the farm land consolidation was carried out, the archeological digging was not done appropriately - so that what the Tojo area looked like in the Nara Period could be visualized - and instead destroyed the remains, the real picture is unclear. But by piecing together the fragments of evidence currently available, it can be seen that settlements were being created in the small cultivated land areas around the city hall area, at the sand hill in the square, around the mountains, and along the rivers.

On November 11th 1264 Saint Nichiren was ambushed by Tojo Kagenobu at Komatsubara while on his way from Rengeji Temple to Amatsu - where he was invited to by Amatsu Castle's lord Kudo Yoshitaka - and Kudo Yoshitaka and three of Nichiren's disciples such as Kyonin were wounded and killed, and Nichiren also injured his forehead. The temple built on this site of the Religious Oppression of Komatsubara by Kudo Yoshitaka's orphaned son Nichiryu, who became Nichiren's disciple, is called Kyoninji Temple.

It is said that people from later generations built a tumulus where Kudo Yoshitaka, who was martyred in Nichiren's Religious Oppression of Komatsubara. Now, it is just a tumulus of which the length of one side is 6m, but before it was partly cut out by roadwork etc., it was a 17 x 17m square area. Currently, it is in a shape that it seems like the tumulus is protruding out to the streets, but also in a map from the Edo Period the roads seem to be winding all around the tumulus. Epitaphs with the inscriptions "Nichigyoku-shonin", "Nichiryu-shonin" and "Nichigyo-shonin", built by the 23rd Chief Buddhist Priest of Kyoninji Temple in 1768, can be seen on top of the mound.

Saigo Masakazu, who used to govern the feoffed country, Shimofusakokuoyumi , came here to take up a new job as the Daimyo (feudal lord) of ten thousand goku (unit of area measured by how much rice crop it can bear) , with Nagasa & Asai as his territory and the land he was feoffed doubled his previous amount. As he settled his jinya (residence) in Tojo Village, it was called Tojo Domain. In the archeological investigation that took place in 1975, remains of a jinya surrounded by a ditch 4m wide and 2m deep was uncovered from Hoshoji Temple. Relics depicting daily life in the jinya such as furniture and fixtures, wooden trays, wooden clogs and battledores have also been found.

In an archeological investigation on the Site of the Saigo clan's manor house at Hoshoji Temple, the remains from the medieval times surrounded by a ditch was uncovered from the bottom layer, and a link was revealed between the manor house of the Tojo clan who were estate stewards. However, it cannot be determined whether this is really the manor site, as the temple records of Eimeiji Temple, the structure of the remains and the contents of the relics suggest a possibility that the remains uncovered at Hoshoji temple could be a part of a temple built by Tojo Kagenobu. Rather, it can be estimated that the manor site persists here, as the areas previously thought to be sites of the Tojo clan's manors are rich in the amount of scattered kawarake (pieces of terracotta) etc.

In 1184, Minamoto no Yoritomo dedicated the Tojo-kyo to Isejingu Shrine, and the centre of this Tojo-kyo was the "Tojo-moke". "Tojo-moke" has been already recorded in the "Azumakagami" (ancient historical documents) that "Tojo-moke" was one of the temples and shrines nearby which Yoritomo visited to pray for his wife Masako to have a safe delivery, but it is unclear whether "Tojo-moke" mentioned is the current Amatsushinmei Shrine or Mokejinja Shrine in Nishimachi.

It is told that the Tojo clan used Muroto Castle as a main castle and Kaneyama Castle as a supporting castle. Now, it is harder to grasp the surroundings due to the dense woods, but this castle effectively uses the vertical cliff sides and also makes stepping cuts with koshiguruwa (defense area) around them. Even though the castle in Kamajura Period was only used as 'escape castle' with just a fence around it and no-one lived in them daily, this one is in a key strategic location where it can respond to both attacks from the sea and the land. It can be estimated that Tsurumi Castle and Nakadaimine Castle functioned as one with Muroto Castle.