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TAI/YOU — An Energy-Independent House Using Solar Thermal and Solar Power
TAI/YOU — An Energy-Independent House Using Solar Thermal and Solar Power
Osaka, Japan
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Other Projects by SIA (Second International Architecture) / Masahiro Katsuki
TAI/YOU — An Energy-Independent House Using Solar Thermal and Solar Power
Osaka, Japan
Type
STATUS
Built
YEAR
2020
SIZE
0 sqft - 1000 sqft
BUDGET
$1M - 5M
“Architecture is shaped by the environment that surrounds the individual.”
With this idea in mind, we asked whether it would be possible to create a self-sufficient house powered entirely by natural energy, using both solar power and solar thermal energy.
The site is located in Jūsō, Yodogawa Ward, Osaka—a downtown entertainment district with a strong local character. The project began after being selected through a model-house competition organized by Upliving Co., Ltd., a locally rooted house builder based in the area.
The project also collaborates with Yodokabe, a community initiative in which local artists create murals throughout Jūsō to brighten the neighborhood. For the exterior wall, a sun motif was painted by local artist BAKIBAKI (Kohei Yamao), integrating architecture with the cultural life of the town.
Beyond the artwork, the house was designed with a strong emphasis on environmental performance. High thermal insulation was achieved using cellulose fiber and Neo-Mazheus insulation. For building services, a system combining photovoltaic panels, battery storage, and whole-house air conditioning (OMX / OM Solar) was adopted, aiming for a fully energy-self-sufficient residence powered by solar energy—an All Time Real ZEH.
The house has obtained certification as a Long-Life Quality Housing project, Seismic Grade 3, BELS five-star rating, CASBEE Rank S, and HEAT20 Grade G2 (envelope performance UA value: 0.39). It also meets ZEH (Net Zero Energy House) standards.
Building Data
Client: Upliving Co., Ltd.
Contractor: Omori Construction + NERF Co., Ltd.
Design: Masahiro Katsuki (SIA First-Class Architect Office)
+ Taiki Ogawa (Upliving Co., Ltd.)
Use: Office + Model House
Household: Couple + one daughter
Address: 2-1-5 Jūsō-Motohimazato, Yodogawa-ku, Osaka 532-0028, Japan
Site Area: 66.92 m²
Building Coverage Ratio (Designated): 80%
Floor Area Ratio (Designated): 300%
Building Area: 50.77 m²
Total Floor Area: 135.09 m²
Building Coverage Ratio (Actual): 75.86%
Floor Area Ratio (Actual): 161.49%
Finishes / Insulation: Cellulose fiber, Neo-Mazheus
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