Aida Sekkei Co., Ltd.

Aida Sekkei Co., Ltd. (株式会社アイダ設計) is a Japanese wooden house manufacturer headquartered in Ageo, Saitama Prefecture. Founded on January 6, 1981, the company has grown into a regional housebuilder with 96 branch and sales offices across Japan, covering areas from Kanto and Tohoku to Hokuriku, Tokai, Kansai, Kyushu, and Okinawa. Its business spans real estate, construction, architectural design, land development, and pre-cut processing, and it also operates its own pre-cut factory. The company is known for its "honest pricing" (正直価格) philosophy, aiming to provide affordable, high-quality homes through a separated ordering system and economies of scale. Its main product lines include the BRAVO series of custom-built houses, the 999万円の家 (9.99 million yen house), and the ほっとする家 (Hotto Suru Ie) single-story home for retirement living. It also offers ready-built subdivision housing under the Irodori Aitown brand. Aida Sekkei is listed on the Tokyo Stock Exchange's TOKYO PRO Market with the securities code 2990. As of March 31, 2026, it had 989 employees and reported sales of 57.8 billion yen for the fiscal year ended 2025 (46th term). The company has overseas affiliates in China and the Philippines. It is also active in broadcasting sponsorship, with commercials featuring actor Koizumi Kotaro since April 2016, and sponsors sports teams such as the Yomiuri Giants and Omiya Ardija.

Aida Sekkei Co., Ltd. was founded on January 6, 1981, in Ageo, Saitama Prefecture, Japan. The company started as a design-focused housebuilder and gradually expanded its operations to include real estate, construction, and land development. Over the decades, it grew its network of branch and sales offices to 96 locations, covering a wide area from Kanto and Tohoku to Hokuriku, Tokai, Kansai, Kyushu, and Okinawa. The company established its own pre-cut factory to control costs and quality, enabling it to offer low-cost homes without compromising on structural integrity. In the 2000s, Aida Sekkei began airing television commercials, including the famous "555万円で自由設計の注文住宅が建てられる!" (You can build a custom-designed house for 5.55 million yen!) campaign, which used music from Verdi's opera "Aida" as a pun on the company name. The company also expanded overseas, establishing Aida Architectural Design (Shanghai) Co., Ltd. in China in February 2006 and AIDA HOME DESIGN PHILIPPINES, INC. in April 2015. In October 2014, the company was referred to prosecutors by the Tokyo Metropolitan Police Department for entrusting industrial waste disposal to an unlicensed contractor, a scandal that led to a temporary suspension of some TV sponsorships. The company apologized and accepted the charges. In recent years, Aida Sekkei has focused on energy-efficient homes, launching the BRAVO ZEH series and promoting SDGs. It marked its 45th anniversary on January 6, 2026. The company is listed on the Tokyo Stock Exchange's TOKYO PRO Market under the ticker 2990. As of March 31, 2026, it employed 989 people and reported annual sales of 57.8 billion yen for the fiscal year ended 2025.

• Company founded in Ageo, Saitama.

• Aida Shoko appears in TV commercials (until March 2007).

• Aida Architectural Design (Shanghai) Co., Ltd. established in China.

• Company and employee referred to prosecutors for illegal industrial waste disposal.

• AIDA HOME DESIGN PHILIPPINES, INC. established in the Philippines.

• Koizumi Kotaro becomes CM spokesperson.

• 45th anniversary of founding.

Low-cost, high-quality wooden houses with honest pricing

• BRAVO series

  Custom-built houses with standard specifications, including BRAVO Standard 2, BRAVO 2, and BRAVO ZEH.

• 999万円の家

  A low-cost custom-built house priced at 9.99 million yen.

• ほっとする家

  A single-story house designed for retirement living.

• Irodori Aitown

  Ready-built subdivision housing.

1. 1アイダ設計 公式サイトaidagroup.co.jp
2. 2企業情報aidagroup.co.jp
3. 3メディア情報aidagroup.co.jp
4. 4個人情報保護方針aidagroup.co.jp
5. 5アイダ設計 - Wikipediaja.wikipedia.org
6. 6Aida Sekkei - Wikidatawikidata.org