Although the modern city of Izu was only administratively formed in 2004 through the merger of Shuzenji, Toi, Amagiyugashima, and Nakaizu, the history of these lands dates back over a thousand years. The territory was part of the historical Izu Province and played an important role in the political life of medieval Japan.
Key Factors of Development
The region's development was determined by a unique combination of natural resources and geographical location:
Geology and Hot Springs: The peninsula's volcanic activity gifted the region with rich thermal waters. The famous resort of Shuzenji was, according to legend, founded in 807 by the Buddhist monk Kukai (Kobo Daishi), laying the foundation for the development of balneological culture.
Gold Mining: The Toi area became famous thanks to a gold mine opened during the Keicho era (late 16th – early 17th century). The Toi Gold Mine was one of the most productive in Japan, ensuring economic prosperity and direct interest from the Tokugawa Shogunate.
Political Isolation: Due to the mountainous terrain, the area was difficult to access, which during the Kamakura period turned it into a place of exile for high-ranking individuals, including members of the Minamoto clan.
Early Cultural and Economic Features
In early periods, the region's economy was based not only on mining but also on forestry and charcoal production. A special place in the culture and agriculture was occupied by the cultivation of wasabi in clear mountain streams, which remains a signature product of Izu today.
The cultural landscape formed around Buddhist temples and onsens (hot springs), creating an atmosphere of seclusion that attracted writers and poets for many centuries.
Timeline
Key Historical Milestones
807: According to tradition, the Buddhist monk Kobo Daishi founded Shuzenji Temple, which became the spiritual center of the region.
1204: The former shogun Minamoto no Yoriie was killed in Shuzenji while in exile following a political struggle.
1601: The Tokugawa Shogunate began large-scale development of the Toi Gold Mine, turning it into one of the country's most important sources of gold.
1889: During a nationwide administrative reform, the boundaries of local villages and towns were officially established.
1924: The opening of Shuzenji railway station provided a direct connection to the outside world and stimulated the influx of tourists.
1958: The region was struck by the devastating Kanogawa Typhoon, necessitating long-term infrastructure restoration.
1965: The Toi Gold Mine was closed as an industrial enterprise and subsequently transformed into a museum complex.
2004: The modern city of Izu was officially formed by merging the towns of Shuzenji, Toi, Amagiyugashima, and Nakaizu.
2011: The city's territory became part of the newly formed Izu Peninsula Geopark.
2018: The Izu Geopark received the prestigious status of a UNESCO Global Geopark, confirming its geological uniqueness.
2021: The city hosted cycling competitions (track and mountain bike) as part of the rescheduled Tokyo 2020 Summer Olympic Games.
Milestones
Milestones of Development and Transformation
The history of Izu's modern identity is a journey from secluded mountain settlements to a recognized international resort. Key stages in the city's development are linked to changes in its economic role and infrastructure breakthroughs.
Formation of a Spiritual and Balneological Center (since the 9th Century)
The founding of Shuzenji Temple and the discovery of healing springs determined the region's specialization for a millennium to come. This transformed the area from a wild mountain region into a prestigious resort for the aristocracy and creative intelligentsia, laying the foundation for cultural tourism.
Industrial Rise of the Edo Period (since 1601)
The start of large-scale development at the Toi Gold Mine made the region strategically important for the economy of all Japan. The influx of workers and engineers contributed to the development of trade and the appearance of the first large settlements on the peninsula's west coast.
Transport Revolution (1924)
The opening of the railway connection (Sunzu Line) to Shuzenji Station was a turning point. The railway broke the geographic isolation of the mountain areas, opening the floodgates for mass tourism from Tokyo and turning resort vacations into affordable leisure.
Urban Reconstruction (after 1958)
The tragedy caused by the Kanogawa Typhoon led to a large-scale reconstruction of the urban environment. Modern dams were built, riverbanks were reinforced, and residential areas were replanned, creating the safe infrastructure that serves the city to this day.
Economic Paradigm Shift (1965)
The closure of the depleted gold mine marked the final transition from the mining industry to the hospitality industry. Transforming the mine into a tourist attraction allowed the historical heritage to be preserved while monetizing it in a new way.
Administrative Consolidation (2004)
The merger of four separate towns (Shuzenji, Toi, Amagiyugashima, and Nakaizu) into the single city of Izu allowed for centralized resource management. This gave a boost to the creation of a unified tourism brand and the comprehensive development of the territory.
Global Recognition and Sports Modernization (2018–2021)
Attaining UNESCO Global Geopark status and hosting Olympic cycling competitions brought Izu onto the world stage. This attracted investment in sports facilities (Izu Velodrome) and ecological routes, diversifying the tourism offering.
Architecture
Urban Structure and Architectural Identity
The architectural landscape of Izu is unique because it lacks a single urbanized center with dense high-rise buildings. Instead, the city features a polycentric structure, uniting historical resort villages (Shuzenji, Toi) and rural areas scattered along rivers and mountain valleys. The city's appearance has been shaped in harmony with the complex terrain and natural hot springs.
Architectural Eras and Styles
The buildings in Izu reflect a transition from traditional Japanese architecture to functional modernism, with a particular emphasis on hospitality architecture (ryokans).
Traditional Buddhist Architecture (Heian – Edo Period)
Temple architecture is the dominant feature of the historical district.
Style: Traditional Japanese style with Zen Buddhist elements. It is characterized by massive wooden structures, curved roofs, and laconic decor.
Key Landmark:Shuzenji Temple. Although the original 9th-century buildings have not survived, the current Main Hall (Hondo), reconstructed in the late 19th century, preserves the canonical proportions and aesthetics of old Japan.
Resort Architecture and Sukiya-zukuri Style (Meiji – Showa Era)
The prosperity of Shuzenji as a getaway for the intelligentsia led to the appearance of exquisite wooden inns.
Style:Sukiya-zukuri — a refined architectural style derived from tea house aesthetics. It is distinguished by the use of natural materials (wood, bamboo, clay), lightweight structures, and a close connection between the interior and the garden.
Key Landmark:Arai Ryokan. A complex of buildings, many of which are recognized as Tangible Cultural Properties of Japan. Here, you can see a masterful combination of traditional techniques and artistic carving.
Industrial Heritage (Edo – Meiji Era)
In the Toi district, architecture was dictated by the needs of gold mining.
Style: Utilitarian industrial architecture and traditional miners' residential buildings.
Objects: Reconstructed tunnels and administrative buildings of the Toi Gold Mine, demonstrating the engineering solutions of the past.
Modernism and High-Tech (Heisei – Reiwa Era)
The new era brought sports and public facilities to the Izu landscape, built using modern technologies and earthquake-resistant materials.
Style: High-tech, structural expressionism.
Key Landmark:Izu Velodrome. An indoor cycling track with a silver dome that served as a venue for the 2020 Olympic Games. The building stands out against the green mountains with its futuristic shape and complex geometry.
Features of the Urban Environment
Izu's urban planning is governed by natural landmarks — the Kano River and mountain ranges. In the Shuzenji area, the urban fabric forms around the Katsura River, where famous red bridges create a recognizable visual rhythm, linking the banks and historical ryokans into a single ensemble. In the coastal district of Toi, development is oriented toward Suruga Bay, combining the functions of a fishing port and a seaside resort.
Notable People
Outstanding Personalities of Izu
The history of Izu is inextricably linked with the names of great rulers, religious figures, and classics of Japanese literature. Many of them sought healing here in the hot springs or inspiration in the secluded mountain landscapes, leaving an indelible mark on the region's cultural heritage.
Kukai (Kobo Daishi) (774–835) Buddhist monk, founder of the Shingon school, and educator
A key figure in the city's spiritual history. According to legend, in 807, seeing a son washing his sick father in cold river water, Kukai struck a rock with his ritual rod (tokko), and a hot spring gushed out. This is how the famous Tokko-no-yu in Shuzenji appeared — the oldest onsen in the region, around which the resort and Shuzenji Temple grew.
Minamoto no Yoriie (1182–1204) The second shogun of the Kamakura Shogunate
A tragic historical figure. After losing a power struggle, Yoriie was exiled to Shuzenji Temple, where he was soon killed by assassins in a bathhouse. His grave and the memorial sites associated with his death are important historical landmarks in the city.
Hojo Masako (1157–1225) Political figure and wife of the first shogun, Minamoto no Yoritomo
The mother of the murdered shogun Yoriie. Grieving for her son, she founded the Shigetsuden sutra library in Shuzenji to pray for the repose of his soul. This building survives today and is considered the oldest wooden structure in Izu.
Natsume Soseki (1867–1916) Writer and classic of modern Japanese literature
In 1910, he came to Shuzenji to treat a stomach ulcer. While here, he suffered severe hemorrhaging and experienced a state of clinical death, known in literary studies as the "Crisis in Shuzenji." This near-death experience significantly influenced the philosophy of his later works.
Kawabata Yasunari (1899–1972) Writer and Nobel Prize laureate in Literature
He frequently stayed at a ryokan in the Yugashima (Amagi) area, where he worked on his manuscripts. It was a journey across the Izu Peninsula that inspired him to write the famous novella "The Izu Dancer", which brought worldwide fame to the local landscapes and the Amagi Pass.
Inoue Yasushi (1907–1991) Writer and poet
He spent his childhood in the village of Yugashima (now part of Izu City). His autobiographical novel "Shirobamba" describes in detail the life, customs, and nature of these places in the early 20th century. A museum dedicated to his work is open in the city, and the house where he lived has been preserved.
Okamoto Kido (1872–1939) Dramatist and writer
Author of the famous Kabuki play "Shuzenji Monogatari" ("The Tale of Shuzenji"). The play, based on legends of masks and the tragedy of the Minamoto clan, was a resounding success in the early 20th century and turned Shuzenji into a popular tourist destination.