Sono Family Main Building

Sono Family Residence Main House: A Window into Amami Oshima's Architectural Heritage

Tucked away on a quiet hillside in the Yoan district of Kasari, Amami City, the Sono Family Residence Main House (薗家住宅主屋) stands as a living testament to the traditional building culture of Amami Oshima. Designated as a nationally Registered Tangible Cultural Property in December 2007, this single-story wooden dwelling preserves the island's distinctive split-wing layout and typhoon-resistant Hikimon construction — architectural traditions that set Amami apart from both mainland Kagoshima and Okinawa. With over 150 years of history and a beautifully maintained garden designated as a municipal cultural property, the Sono family estate offers visitors a rare and intimate glimpse into the island's past.

Historical Background

The Sono family has long been a prominent household in the Yoan community of Kasari, northern Amami Oshima. The main house dates to the Meiji era (1868–1911) and underwent relocation and renovation in 1943 and again around 1950. During the Satsuma domain period, the Sono family served as hosts for visiting officials, earning a distinguished reputation in the local community. Now in its fifth generation under the care of Mr. Sono Hiroaki, the residence and its grounds continue to be lovingly maintained as both a family home and a cultural treasure.

Amami Oshima has a unique architectural lineage shaped by the island's subtropical climate, frequent typhoons, and limited availability of large building timber. The folk houses of Amami developed independently from those of mainland Japan and Okinawa, incorporating techniques influenced by Southeast Asian building traditions. The Sono residence is one of the finest surviving examples of this distinct heritage, alongside the nationally designated Important Cultural Property Izumi Family Residence and the Registered Tangible Cultural Property Former Yasuda Family Residence, both also located in Kasari.

Why It Was Designated as a Cultural Property

The Sono Family Residence Main House was registered as a national Tangible Cultural Property on December 5, 2007, in recognition of its outstanding preservation of Amami's traditional residential architecture. Several key features contributed to this designation:

• The residence retains the classic Amami split-wing (buntō-gata) layout, comprising the Omote (main reception and living wing) and the Tōgora (kitchen and dining wing) as separate structures within the same estate.
• The Omote wing features the Hikimon construction method — a distinctive Amami building technique where horizontal tie-beams (hikimono) are threaded through the columns to form an exceptionally sturdy framework capable of withstanding powerful typhoons.
• The traditional floor plan of the Omote, with its eight-tatami main room equipped with a tokonoma alcove and decorative shelf, plus the Nesho (sleeping room) and Koza (small room), faithfully represents the standard Amami residential layout of the Meiji period.
• The hipped roof with iron-sheet roofing and the overall building footprint of 85 square meters reflect the practical constraints and ingenious solutions of island architecture.

Architectural Highlights and Attractions

The most striking feature of the Sono residence is its Hikimon construction. Unlike conventional Japanese timber-frame techniques, the Hikimon method passes large beams and girders through the columns, locking them in place with wooden wedges rather than iron nails. This creates a remarkably strong structure while also allowing the building to be disassembled and relocated — a practical advantage on an island where timber was historically scarce and often transported from the southern forests of Sumiyō and Yamato Village.

The split-wing arrangement is another hallmark of Amami domestic architecture. The Omote serves as the formal living and reception space, while the Tōgora functions as the kitchen and everyday dining area. These structures are deliberately kept separate, both as a defense against typhoon damage — smaller buildings are more wind-resistant — and as a reflection of the island's traditional way of life.

Surrounding the residence, the estate grounds feature a lush garden that has been designated as a cultural property by Amami City. Visitors approaching the house pass through a dense canopy of subtropical trees that creates an almost primeval atmosphere. The temperature drops noticeably beneath the green cover, and the air fills with the cool, earthy scent of moss and tropical foliage. On the property, a traditional Kami no Michi (Path of the Gods) leads from the hilltop down to the sea — a sacred route found in every Amami village, believed to be the path by which gods descend from the sky, travel to the ocean, and return again as rain.

Visitor Information

The Sono Family Residence is a private home, and visitors are kindly asked to call out or notify the residents before entering the grounds. The garden is open for viewing, and Mr. Sono Hiroaki, the current caretaker, is happy to share stories and knowledge about the property by prior arrangement.

The residence is located approximately 10 minutes by car from Amami Airport. After heading south from the airport on Prefectural Route 82 toward Naze, look for the Midorigaoka Elementary School sign and turn right up the hill. After a few minutes, a stone marker reading "Sono-ke no Niwazukuri Entrance" will appear on the left. Follow the lane and watch for a narrow side road on the right leading to the property.

Contact: Mr. Sono Hiroaki — 090-5088-3676 (please call in advance if you wish to hear a guided explanation).

Surrounding Attractions

The Kasari area of northern Amami Oshima offers numerous attractions within easy reach of the Sono residence:

• Yoan Beach: A beautiful sandy beach just minutes away, adjacent to the Amami Resort Bashayama Village, offering swimming, snorkeling, and sea turtle watching tours.
• Bashayama Village (ばしゃ山村): A resort and cultural facility where visitors can experience Amami's traditional crafts, island songs, and local cuisine including keihan (chicken rice), the famous regional dish.
• Former Yasuda Family Residence: Another Registered Tangible Cultural Property within the Bashayama Village complex, showcasing similar Hikimon construction and Amami architectural traditions.
• Izumi Family Residence: A nationally designated Important Cultural Property in the nearby Ushuku community, featuring the best-preserved example of traditional Amami residential architecture with a complete set of outbuildings, granary, and coral-stone wells.
• Ayamaru Misaki (あやまる岬): The northernmost cape of Amami Oshima, offering a spectacular 220-degree panoramic view of the Pacific Ocean and, on clear days, the distant island of Kikai.
• Amami Park and Tanaka Isson Memorial Art Museum: A cultural complex near the airport celebrating the natural beauty and artistic heritage of Amami through the works of the renowned painter Tanaka Isson.