Event Report: May 19, 2026 – 'Strategy for Popularizing High-Value-Added Housing: Overturning the Myth that High-Performance Spec Housing Isn't Profitable'
On May 19, 2026, the Japan Excellent Builder Promotion Association (JGBA) held an online seminar featuring Tatsuya Oikawa, Representative Director of Says Co., Ltd. The seminar, titled 'Strategy for Popularizing High-Value-Added Housing,' attracted 21 participants from construction firms nationwide. Key takeaways included Says Co., Ltd.'s methods for maximizing profits through high-value-added housing and their approach to organizational development rooted in management philosophy.
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- 📰 Published: May 23, 2026 at 00:29
- 🔍 Collected: May 22, 2026 at 16:01
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On May 19, 2026 (Tuesday), the Japan Excellent Builder Promotion Association (JGBA; Headquarters: Minato-ku, Tokyo; Representative Director: Ryo Tajima) hosted an online seminar titled 'Strategy for Popularizing High-Value-Added Housing: Overturning the Myth that High-Performance Spec Housing Isn't Profitable.' The event drew 21 participants.
In this seminar, Tatsuya Oikawa, Representative Director of Says Co., Ltd.—a firm boasting an overwhelming record of being number one in housing supply for 10 consecutive years within an association of approximately 500 builders—and other section leaders took the stage to share their specific management techniques.
The company has realized an organizational structure characterized by 'lean, elite' teams, achieving a 2.4-fold growth in sales while keeping headcount nearly flat. They shared deep insights into the fundamentals of customer attraction, sales, and their core management philosophy.
In his closing remarks, Oikawa stated that the most important task for a manager is to 'envision the goal.' He reflected on their journey of management based on the philosophy of 'pursuing the real thing,' which began 16 years ago. He revealed that in organizational operation, by introducing a self-evaluation system based on behavioral characteristics and values, rather than just quantitative results, employees grow proactively, forming the 'strongest team' that resonates with the corporate philosophy.
Participants provided feedback such as, 'It was a meaningful session, covering everything from practical content to how to instill management philosophy,' and 'It really hit home how the added value of high performance allows us to generate profits without getting caught in price wars.'
■ Says Co., Ltd.
Based mainly in Katsushika and Edogawa wards, Tokyo, Says Co., Ltd. is a community-based home builder dealing in newly built detached houses (spec and custom) and renovations. Known for both design and high residential performance, the company holds the national number-one record for 10 consecutive years in the construction of 'Super Wall' homes, which achieve high seismic resistance, airtightness, and insulation. They provide a comprehensive, one-stop, in-house system covering everything from land procurement and design to construction, sales, and lifetime after-maintenance.
In this seminar, Tatsuya Oikawa, Representative Director of Says Co., Ltd.—a firm boasting an overwhelming record of being number one in housing supply for 10 consecutive years within an association of approximately 500 builders—and other section leaders took the stage to share their specific management techniques.
The company has realized an organizational structure characterized by 'lean, elite' teams, achieving a 2.4-fold growth in sales while keeping headcount nearly flat. They shared deep insights into the fundamentals of customer attraction, sales, and their core management philosophy.
In his closing remarks, Oikawa stated that the most important task for a manager is to 'envision the goal.' He reflected on their journey of management based on the philosophy of 'pursuing the real thing,' which began 16 years ago. He revealed that in organizational operation, by introducing a self-evaluation system based on behavioral characteristics and values, rather than just quantitative results, employees grow proactively, forming the 'strongest team' that resonates with the corporate philosophy.
Participants provided feedback such as, 'It was a meaningful session, covering everything from practical content to how to instill management philosophy,' and 'It really hit home how the added value of high performance allows us to generate profits without getting caught in price wars.'
■ Says Co., Ltd.
Based mainly in Katsushika and Edogawa wards, Tokyo, Says Co., Ltd. is a community-based home builder dealing in newly built detached houses (spec and custom) and renovations. Known for both design and high residential performance, the company holds the national number-one record for 10 consecutive years in the construction of 'Super Wall' homes, which achieve high seismic resistance, airtightness, and insulation. They provide a comprehensive, one-stop, in-house system covering everything from land procurement and design to construction, sales, and lifetime after-maintenance.
FAQ
セミナーのテーマは何でしたか？
「高性能分譲は儲からないを覆す 高付加価値住宅の普及戦略」がテーマです。
セイズ株式会社の強みは何ですか？
デザイン性と高い住宅性能（スーパーウォール工法など）を強みとし、土地仕入れからアフターメンテナンスまで自社一貫のワンストップ体制を整えています。
セイズ株式会社は住宅性能でどのような実績がありますか？
「スーパーウォール工法」の施工棟数で10年連続全国1位の実績を誇ります。
セミナーではどのような経営術が語られましたか？
社員数をほぼ横ばいに保ちながら売上を2.4倍に成長させる少数精鋭の組織づくり、集客、営業、および理念経営に関する知見が共有されました。
JGBA（一般社団法人日本優良ビルダー普及協会）とはどのような団体ですか？
地域の工務店、ビルダー、住宅設備関連企業が集まり、勉強会や視察会を通じて住宅業界の発展を目指す団体です。