Designing the places
no one sees.見えない場所を、設計する。
Track record実績
SEDS + SOWA Group25
Designs in 15 Months
SEDS / 2025.08–2026.10
10
Years of MEP Design
SEDS / Since 2016
20
Prefectures
SOWA Group / Hokkaido to Kumamoto
230+
Projects Built
SOWA Group / 2023–2026
01
No PrecedentNo precedent? Still an answer.
01
Nuclear Off-site CenterUndisclosed
MEP DesignNo precedent, so we researched everything firstPlumbing, HVAC, electrical201802
Seven Public Schools & UniversitiesTokyo
HVAC Retrofit DesignDetailed design and load calculations, with an architect’s officeHVAC2023–2502
Design to BuildFrom design to build, as one team
03
Tech Company Headquarters AnnexNagoya, Aichi
HVAC + Plumbing DesignVentilation and heat load calculations through to permit documentsPlumbing, HVAC2025–2604
Bookstore & CaféKaruizawa, Nagano
MEP Design + BuildDesigned by SEDS / built by SOWA Service and KD WorkPlumbing, HVAC, electrical2025–2605
Manufacturing Headquarters ExtensionKasugai, Aichi
HVAC Design + BuildDesign, construction and as-built drawings in one packageHVAC2025–2606
PenthouseMinato, Tokyo
Full MEP Design in 2 WeeksElectrical, HVAC, plumbing, gas, floor heating, fire alarm / capacity calculationPlumbing, HVAC, electrical202607
Shopping MallHiroshima
HVAC Design + BuildThe group’s largest HVAC projectHVAC202403
Tokyo InteriorsOffices and shops in central Tokyo
08
Sales Gallery, Mixed-use TowerChuo, Tokyo
HVAC + Plumbing DesignFrom design drawings to as-builtPlumbing, HVAC202609
Tech Company Office ExpansionMinato, Tokyo
HVAC Design + Project ManagementHVAC design and project managementHVAC202610
Entertainment Company HeadquartersTokyo
HVAC DesignHVAC and ventilation design for a head office moveHVAC202611
Financial Institution OfficeChiyoda, Tokyo
HVAC + Plumbing DesignHVAC and mechanical design for an office renovationPlumbing, HVAC2026info@seds.jp