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Seto Shrine and Tokugawa Ieyasu: The Ancient Shrine of Kanazawa Preserved by the Shogun Who Revered Yoritomo
Seto Shrine in Kanazawa, Yokohama, was founded in 1180 by Minamoto no Yoritomo as a guardian of maritime traffic. After entering the Kanto region in 1590, Tokugawa Ieyasu visited the shrine and, out of deep reverence for Yoritomo, issued a vermilion-seal land grant of 100 koku. This article examines the sacred site of Kanazawa that links Yoritomo and Ieyasu through the continuity of warrior governance.
武
Author
Taketoki
| Samurai History
Contents
MOKUJI
一
The Founding of Seto Shrine: Yoritomo's Enshrinement and Maritime Protection
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二
Ieyasu's Entry into Kanto in 1590: What He Inherited
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三
The Vermilion-Seal Land Grant: What 100 Koku Signified
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四
Posthumous Deification: Ieyasu Enshrined as Tosho Daigongen
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五
Summary
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六
Frequently Asked Questions
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Seto Shrine (瀬戸神社) in Kanazawa, Yokohama, was founded in 1180 when Minamoto no Yoritomo (源頼朝), the first shogun of the Kamakura shogunate, enshrined a deity from Izu to protect maritime traffic along the coast. More than four hundred years later, in 1590, another warrior who saw himself as the rightful successor to warrior governance stood before this ancient shrine: Tokugawa Ieyasu (徳川家康).
The main hall of Seto Shrine, founded in 1180 by Minamoto no Yoritomo as a maritime guardian of Kanazawa
Wikimedia Commons / Public Domain
Why did Ieyasu, who deeply revered Yoritomo and sought to establish himself as the legitimate heir of warrior authority, give special attention to this old shrine in Kanazawa Hakkei? This article examines the historical evidence through the issuance of a vermilion-seal land grant (朱印状, goshuinjo), reading the story through the continuity of warrior governance in Japan.
The Founding of Seto Shrine: Yoritomo’s Enshrinement and Maritime Protection
The Political Meaning of Enshrinement
The founding of Seto Shrine is recorded as having taken place in 1180. That year, Minamoto no Yoritomo, exiled to the Izu Peninsula, raised an army to overthrow the Taira clan. Though he suffered defeat at the Battle of Ishibashiyama, he escaped to the Boso Peninsula and regrouped with the support of eastern warrior bands.
During his advance, Yoritomo is said to have enshrined a divided spirit (bunrei) of the Izu Mishima Myojin deity at this site in Kanazawa, founding a new shrine with Oyamazumi no Kami as its principal deity. The act of transporting the divine power of Izu along his military route into the Kanto region can be interpreted as a unified act of military expansion and spiritual legitimization.
The Kanazawa Hojo Clan and the Shrine
After the establishment of the Kamakura shogunate, the Kanazawa area became the domain of the Kanazawa Hojo clan, a branch of the main Hojo family. Hojo Sanetoki (1236-1284), the founding figure of this branch, was renowned for his learning and established Shomyoji as his family temple — the Buddhist complex whose surviving garden and book collection remain important cultural properties today.
Seto Shrine functioned as the tutelary shrine (ujigami) of the Kanazawa Hojo clan. The Benten island (Biwa Island) within the shrine precincts is traditionally said to have been donated by Hojo Masako, Yoritomo’s wife and the Nun Shogun who directed shogunal affairs after her husband’s death.
Portrait of Hojo Masako, said to have donated the Biwajima Benzaiten within Seto Shrine
Wikimedia Commons / Public Domain
Seto Akizuki and Kanazawa Hakkei
Beyond its warrior connections, Seto Shrine gained fame in the Edo period as a scenic site. As one of the Eight Views of Kanazawa (金沢八景, Kanazawa Hakkei) — specifically Seto Akizuki (Autumn Moon at Seto) — the shrine attracted literati and artists. Utagawa Hiroshige’s ukiyo-e prints spread its reputation nationwide.
Ieyasu’s Entry into Kanto in 1590: What He Inherited
The Fall of the Later Hojo Clan
In 1590, the siege of Odawara by Toyotomi Hideyoshi brought an end to the century-long rule of the Later Hojo clan (後北条氏). Following the castle’s surrender, Hideyoshi ordered Tokugawa Ieyasu to relocate from his existing five provinces in the Tokai region to six provinces in the Kanto region. Though widely interpreted as a political move to distance Ieyasu from the capital, Ieyasu accepted the transfer and established Edo Castle as his base.
The Ideological Background of Ieyasu’s Reverence for Yoritomo
One of Ieyasu’s most characteristic behaviors upon entering Kanto was his deep engagement with sites and shrines associated with Minamoto no Yoritomo. The reasons go beyond personal admiration. For Ieyasu to eventually become shogun and establish a new shogunate, projecting an image as the legitimate heir of warrior governance was politically essential. Yoritomo, as the first shogun, occupied a symbolic position as the founding ancestor of warrior rule in Japan.
A visit to Seto Shrine, founded by Yoritomo, must be read in this context. It was not mere tourism or piety, but a politically and religiously meaningful act — a statement by Ieyasu that he stood in succession to the warrior tradition Yoritomo had begun.
Wooden statue of Minamoto no Yoritomo, founder of Seto Shrine and first shogun of warrior governance
Wikimedia Commons / Public Domain
The Vermilion-Seal Land Grant: What 100 Koku Signified
The Nature of a Goshuinjo
After entering Kanto, Ieyasu is recorded as having visited Seto Shrine and stayed overnight in Kanazawa. During this period, he issued a goshuinjo (朱印状, vermilion-seal document) guaranteeing a domain of 100 koku (石) to the shrine. This fact is confirmed through the shrine’s official sources and materials from the Yokohama Kanazawa Tourism Association.
A goshuinjo was an official document issued by a shogun or powerful lord to guarantee the rights and landholdings of temples, shrines, or merchants. The red seal of the issuing authority made it legally binding. For a shrine, receiving such a document meant a stable economic foundation backed by public authority.
One hundred koku was a modest holding by the standards of Edo-period daimyo domains, roughly equivalent to a small-scale hatamoto (direct retainer) landholding. But the significance lay not in the quantity. The fact that Ieyasu himself, as the paramount warrior of his era, issued the document in his own name carried immense political and symbolic weight.
Continued Ratification Through the Edo Period
The shrine domain guaranteed by Ieyasu’s goshuinjo was subsequently ratified (安堵, ando) by successive Tokugawa shoguns throughout the Edo period. Ratification in this context means that each new shogun reconfirmed the rights established by his predecessor. The continuity of this practice demonstrates that Seto Shrine held a special place in the eyes of the Tokugawa family.
The following table compares the two founders of warrior governance and their respective connections to Seto Shrine.
Category
Minamoto no Yoritomo
Tokugawa Ieyasu
Start of rule
Raised army 1180
Entered Kanto 1590
Warrior government
Kamakura shogunate (1st shogun)
Edo shogunate (1st shogun)
Relation to Seto Shrine
Founded (enshrined Izu deity)
Visited; issued 100-koku land grant
Connection to Kanazawa
Founded shrine during military advance
Visited and stayed overnight (recorded)
Posthumous status
Revered as founding ancestor of warrior rule
Enshrined at Seto Shrine as Tosho Daigongen
Portrait of Tokugawa Ieyasu, who issued a 100-koku vermilion-seal land grant to Seto Shrine after entering Kanto
Wikimedia Commons / Public Domain
Posthumous Deification: Ieyasu Enshrined as Tosho Daigongen
The Divine Title of Tosho Daigongen
After his death in 1616, Tokugawa Ieyasu was deified as Tosho Daigongen (東照大権現), a divine title meaning Great Avatar Illuminating the East. Nikko Toshogu serves as the principal shrine, but the Tosho Daigongen was enshrined at numerous locations across Japan.
The deity list of Seto Shrine includes Tosho Daigongen (Tokugawa Ieyasu). That the shrine founded by Yoritomo came to enshrine Ieyasu as a god is not coincidental — it reflects the deepening relationship between the shrine and the Tokugawa shogunate that developed throughout the Edo period.
Ryugeji and the Wider Kanazawa Landscape
Ryugeji (Kanazawa Hakkei), adjacent to Seto Shrine, also preserves traditions connected to Ieyasu. According to records, he stayed at the temple during a tour of Kanazawa in 1591 and issued a land grant of five koku. The parallel act of issuing grants to both shrine and temple suggests Ieyasu was deliberately organizing the religious-authority structure of Kanazawa.
Shomyoji, built by Hojo Sanetoki, completes the picture of medieval Kanazawa. Together, these three sites — Seto Shrine, Ryugeji, and Shomyoji — allow visitors to trace the full arc of warrior governance from the Kamakura period to the Edo period in a single afternoon’s walk.
Shomyoji, the Shingon Risshu temple built by Hojo Sanetoki of the Kanazawa Hojo clan
Wikimedia Commons / Public Domain
Summary
The history of Seto Shrine — from its founding by Minamoto no Yoritomo in 1180, through Tokugawa Ieyasu’s visit and land grant after 1590, to Ieyasu’s posthumous enshrinement as Tosho Daigongen — embodies the continuity of warrior governance in Japan. The structure in which Yoritomo serves as the originating point and Ieyasu inherits his divine authority is rooted in both men’s shared concern with establishing the legitimacy of warrior rule in the Kanto region.
Points for Visitors
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Do not overlook the Benten island (Biwa Island Benzaiten) within the precincts — the intimate island atmosphere, associated with Hojo Masako’s donation, evokes the Kamakura period
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Seto Shrine is within walking distance of Kanazawa Hakkei Station. Walking the precincts with the Seto Akizuki landscape in mind brings Hiroshige’s ukiyo-e prints to life
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Pay attention to the presence of Tosho Daigongen (Ieyasu) enshrined here — the fact that Ieyasu sits as a deity in a shrine founded by Yoritomo carries a weight that is best felt on-site
Related Spots
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Seto Shrine (Kanazawa, Yokohama) — Ancient shrine founded by Yoritomo, endowed with land by Ieyasu
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Ryugeji (Kanazawa Hakkei) (Kanazawa, Yokohama) — Temple where Ieyasu is said to have stayed
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Shomyoji (Kanazawa, Yokohama) — Temple built by Hojo Sanetoki, guardian of the Kanazawa cultural legacy
Frequently Asked Questions
Did Tokugawa Ieyasu actually visit Seto Shrine?
The tradition that Ieyasu visited Seto Shrine and stayed overnight in Kanazawa is recorded in shrine materials and related local sources. The concrete documentary evidence of a 100-koku land grant provides strong corroborating support. However, no primary historical document has been confirmed that records the precise date or detailed circumstances of the visit, so describing it as traditionally recorded is the honest position from the standpoint of historical criticism.
How significant was a 100-koku land grant?
One hundred koku was a modest holding by Edo-period standards, roughly comparable to a small direct retainer’s domain. Its significance was not its size, but the fact that Ieyasu issued it personally — a guarantee from the paramount warrior authority of the age. The land grant was subsequently ratified by successive Tokugawa shoguns, confirming that Seto Shrine held enduring importance for the shogunal family.
Can Seto Shrine and Shomyoji be visited on the same day?
Both are located in Kanazawa, Yokohama, within walking distance of Kanazawa Hakkei Station on the Keikyu line. Adding Ryugeji (Kanazawa Hakkei), all three sites can be covered in a half-day to full day. Shomyoji’s garden changes character with the seasons, and a leisurely visit combining all three sites is recommended.
Last updated: May 22, 2026
── 了 ──
武
Author
Taketoki（たけとき）
Samurai History
Toku editorial team — samurai history. Insists on primary sources and castle-layout diagrams, walking battlefields from Yoritomo's Izu exile sites to the late-Edo battlegrounds.
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This article was
♡ Helpful
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Key Figures
T
Tokugawa Ieyasu
First Shogun of Edo
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M
Minamoto no Yoritomo
First Shogun of Kamakura
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H
Hojo Masako
Nun Shogun
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H
Hojo Sanetoki
Founder of Kanazawa Bunko
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詣
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R
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