Iruma

Founding and First Mentions

Although Iruma received its modern administrative status as a city relatively recently, in 1966, the history of the area's development dates back to ancient times. Archaeological finds confirm that people inhabited these lands as far back as the Paleolithic and Jomon periods. The name "Iruma" itself is historical: it was used for centuries to designate a district in the ancient province of Musashi, with mentions appearing in early Japanese chronicles.

Key Factors of Formation

The transformation of scattered settlements into an important regional center was driven by several factors:

• Geography of the Musashino Plateau: The city is located on an upland with fertile volcanic soils. This created ideal conditions for specific types of farming, distinct from the rice cultivation traditional to the lowlands.
• Transport Accessibility: Proximity to Edo (modern-day Tokyo) and its location on important trade routes, such as the Nikko-wakiokan road, facilitated trade and the exchange of goods with the capital.
• Water Resources: Despite its location on a plateau, the development of irrigation systems during the Edo period allowed for a significant expansion of agricultural land.

Early Cultural and Economic Characteristics

The economic identity of the region formed around agriculture, primarily tea plantations. Iruma became the heart of the production of the famous Sayama Tea. The climatic features of the region, where winters are cold enough for the tea bush, result in the leaves becoming thicker, giving the drink a particularly sweet and rich flavor.

Culturally, the region developed as a community of prosperous farmers and merchants. The tradition of growing tea became more than just a craft; it was the foundation of the local way of life, giving rise to a famous Japanese saying that ranks the taste of tea from this region as the best among all varieties in Japan.

Chronology of City Development

• 701 — Mention of Iruma District in the Taiho Administrative Code, which officially established the name of the area in Japanese history.
• 1889 — As part of a nationwide municipal reform, the town of Toyooka and several villages were formed, creating the territorial basis for the future city.
• 1915 — Opening of the railway connection (now the Seibu Ikebukuro Line), linking the region to the capital and stimulating economic growth.
• 1938 — Founding of the Toyooka Airfield by the Imperial Japanese Army, predetermining the development of aviation infrastructure in the region.
• 1945 — After the end of the Second World War, the airfield came under the control of the US Air Force and became known as Johnson Air Base.
• 1956 — The town of Toyooka merged with the neighboring villages of Kaneko, Miyadera, Fujisawa, and part of Seibu to form the town of Musashi.
• 1958 — The Japan Air Self-Defense Force began operating the base, which received its modern name, Iruma Air Base.
• 1966 — The town of Musashi was renamed and officially granted city (shi) status under the name Iruma.
• 1978 — The entire territory of the former US base residential complex (Hyde Park) was returned to Japan and later converted into a park.
• 2002 — Opening of Sai-no-Mori Park, which became an important recreational center and venue for city festivals.
• 2008 — Launch of the major shopping complex Mitsui Outlet Park Iruma, turning the city into a significant center for shopping tourism in Saitama Prefecture.

Stages of Transformation and Their Significance

The development of Iruma is a story of an agricultural region transforming into a modern Tokyo suburb with a unique cultural code. Key milestones that defined the city's current character include:

• Establishment as a Tea Production Center
  Large-scale tea cultivation on the Musashino Plateau laid the city's initial economic foundation. This shaped a unique agro-landscape that persists today and created the "Sayama Tea" brand, which became a national hallmark for the region.
• Textile Industry Development (Meiji Era)
  The Toyooka district historically developed as a center for silk and textile production. This stage marked the transition from pure farming to the first forms of industrial manufacturing, providing the capital accumulation for further growth.
• Railway Integration (1915)
  The laying of the railway line (now the Seibu Ikebukuro Line) was a decisive factor for local demographics. It connected the provincial region with rapidly growing Tokyo, predetermining Iruma's future as a convenient "bedroom community" for capital workers.
• The Aviation Era and Military Heritage (Since 1938)
  The construction of the airfield and the subsequent hosting of the airbase (initially for the Imperial Japanese Army, then the US, and now the Self-Defense Forces) drastically changed the land-use structure. This created large closed zones that were later, as lands were returned, transformed into key city parks and public spaces.
• The "Johnson Town" Cultural Phenomenon
  The period of American presence at Johnson Base left behind a unique architectural environment. Former residential quarters for officers were not demolished but instead turned into a trendy neighborhood with a 1950s American atmosphere, becoming a significant tourist attraction.
• Urbanization and Mass Housing Construction (1960s–70s)
  Gaining city status in 1966 coincided with the peak of Japan's economic growth. The construction of large residential estates (danchi) turned Iruma into a densely populated city, requiring the creation of modern social infrastructure: schools, hospitals, and roads.
• Commercial Reorientation (2000s)
  The opening of major retail spaces, specifically Mitsui Outlet Park, changed the city's economic vector. Iruma ceased to be just a place of residence and transformed into a significant regional center for shopping and leisure, attracting tourist flows from neighboring prefectures.

Architectural Eclecticism and Urban Planning

Iruma's architectural appearance is not a single ensemble; rather, it is a mosaic reflecting the transformation of a rich agricultural region into a modern satellite of Tokyo. Traditional Japanese estates of tea farmers coexist here with rare examples of early 20th-century Westernization and unique neighborhoods of mid-century American-style housing.

The Taisho and Early Showa Era: Industrial Westernization

During this period, industrialists who grew wealthy from the tea and silk trade began to introduce Western architectural trends to the city, seeking to emphasize their status and progressive outlook.

• Style: Adapted Western Classicism and pseudo-Western style (Giyofu).
• Key Features: Use of brick and stone, arched windows, decorative cornices, combined with traditional Japanese tiled roofs.
• Iconic Landmark: Former Ishikawa Corporation Building (Seibetsukan). Built in 1921 as a guest house for foreign silk buyers, it is a fine example of Western architecture of that era, featuring Art Deco elements and detailed interior craftsmanship.

The Post-War Period: American Suburb (Johnson Town)

A unique feature of Iruma is the preserved architectural layer from the era of the occupation and the presence of the US Air Force. This is a rare example in Japan of a cohesive foreign residential development.

• Style: Mid-20th century American residential style (American suburban style).
• Key Features: One-story wooden "flat houses" with white siding, spacious porches, large windows, and open lawns without high fences.
• Iconic Neighborhood: Johnson Town. A former residential quarter for airbase officers that has been revitalized. Today, these white houses have been carefully restored and serve as cafes, shops, or private residences, creating a 1950s American atmosphere.

Modernity: Urbanization and Functionalism

Upon gaining city status and developing its transport network, Iruma acquired the features of a typical Japanese "bedroom community" interspersed with large commercial zones.

• Style: Modernism, functionalism, and commercial postmodernism.
• Key Features: Multi-story concrete residential complexes (danchi), strict geometry, and an emphasis on utility and seismic resistance. The commercial sector is dominated by large-scale glass and metal structures.
• Iconic Landmarks: Mitsui Outlet Park Iruma — an example of modern retail architecture integrated into the urban environment, and the administrative buildings surrounding Irumashi Station.

Traditional Architecture

Despite urbanization, islands of traditional Japanese architecture related to religious life and the agrarian past remain in the city.

• Style: Traditional Japanese wooden architecture (Wafu).
• Iconic Landmarks: Enjo-ji Temple and numerous Shinto shrines that have preserved classic curved "karahafu" roofs and intricate wood carvings. Additionally, old farmhouses with massive gates and storehouses (kura) can still be found in the vicinity of the tea plantations.

Historical Figures

• Kaneko Ietada
  Samurai, Military Commander (Kamakura Period)
  A prominent warrior from the Kaneko clan, whose domains were located in what is now Iruma. He was renowned for his valor in the Genpei War and his service to the Kamakura Shogunate. Historical sites associated with his name, including a shrine revered by locals, remain in the city.
• Yoshikawa Yoshizumi
  Agronomist, Agricultural Innovator (Edo Era)
  A native of the Miyadera district who played a key role in the history of the regional economy. He developed a unique tea leaf processing technology ("Sayama hi-ire method"), which revitalized local tea farming and made the "Sayama Tea" brand famous throughout Japan.

Culture and Art

• Yusei Matsui
  Mangaka (Comic Artist)
  One of the most successful contemporary manga authors, born in Iruma. He is the creator of global bestsellers such as "Assassination Classroom" and "Neuro: Supernatural Detective." His works have been adapted into popular anime series.
• Yumi Kakazu
  Seiyuu (Voice Actress)
  A famous actress whose voice is familiar to millions of Japanese people. Since 2005, she has voiced Shizuka Minamoto—the main heroine of the iconic anime series "Doraemon," which is a symbol of Japanese pop culture.

Show Business and Sports

• Kei Inoo
  Pop Idol, Singer, Actor
  A member of the famous group Hey! Say! JUMP, managed by the STARTO agency (formerly Johnny & Associates). Besides his musical career, he is known as a TV presenter and actor who actively participates in entertainment programs.
• Nao Asahi
  TV Presenter, Tarento
  A former member of the idol group Idoling!!!, she became one of the most sought-after entertainment show hosts in Japan. Born in Iruma, she often mentions the city in her appearances, helping to popularize it.
• Shugo Imahira
  Professional Golfer
  An outstanding athlete and two-time leader of the Japan Golf Tour money list (2018, 2019). He represents a new generation of Japanese golfers who have achieved success at the national level.