「建築は個をとりまく環境から作られる」

太陽光と太陽熱を利用した自然エネルギーによる自給自足の住宅を作れないだろうかと考えました。

場所は大阪市淀川区、下町歓楽街の十三です。地元を拠点にする地域に根差したハウスメーカーである株式会社アップハウジングがモデルハウスのコンペを募り、採択されてスタートしました。

地元の「淀壁」という十三のまちなみに地元のアーティストが壁画を描いてまちを明るくするプロジェクトとコラボレーションを行い、外壁に太陽をモチーフにして地元のアーティストのBAKIBAKI 山尾光平さんに描いていただきました。

また、アート作品だけではなく環境性能に配慮した家を作ることを目指してセルロースファイバーやネオマゼウスなどを用いて高断熱化し、住宅設備には太陽光＋蓄電池＋全館空調のOMX（オーエムソーラー）を採用して太陽光エネルギーによってエネルギー完全自給住宅〈All Time Real ZEH〉を目指しました。

なお、長期優良住宅、耐震等級３、ＢＥＬＳ認定★５、ＱＡＳＢＥＥランクＳ，HEAT20のＧ２（外皮性能ＵＡ値3.9）、ＺＥＨ（ネットゼロエネルギー）を取得しています。

■建築概要
施主：株式会社アップハウジング
工務店：大森工務店＋株式会社ネルフ
設計：香月真大(SIA一級建築士事務所)
＋小川泰毅（株式会社アップハウジング）
用途：オフィス＋モデルハウス
家族構成：夫婦２人＋娘１人
住所：〒532-0028 大阪府大阪市淀川区十三元今里２丁目１−５
敷地面積：66.92㎡
建蔽率：80％
容積率：300％
建築面積：50.77㎡
延べ床面積：135.09㎡
建蔽率：75.86％
容積率：161.49％
建築仕上・断熱材：セルロースファイバー、ネオマゼウス

“Architecture emerges from the environment surrounding the individual.”
This project began with the question: Can we create a self-sufficient house that relies on natural energy such as sunlight and solar heat?

The site is located in Jūsō, a historic downtown entertainment district in Yodogawa-ku, Osaka.
A design competition was held by Up Housing Co., Ltd., a community-based homebuilder headquartered in the local area. Our proposal was selected and the project began.

In collaboration with “Yodokabe”—a local mural project that revitalizes the streetscape of Jūsō with artwork—we invited local artist Kohei Yamao (BAKIBAKI) to paint a sun-themed mural on the exterior wall.

Beyond the artwork, our goal was to create a house with strong environmental performance. To achieve high thermal insulation, we used cellulose fiber and Neomazeus insulation, and adopted OMX (OM Solar), a system combining solar power generation, battery storage, and whole-house climate control.
Through this, we aimed to realize an All-Time Real ZEH—a fully energy-self-sufficient residence powered by solar energy.

The project meets the standards for Long-Life Quality Housing, Seismic Grade 3, BELS ★5 certification, CASBEE Rank S, and HEAT20 G2 (insulation performance UA value 3.9), as well as ZEH (Net Zero Energy House) certification.

Project Information

Client: Up Housing Co., Ltd.
Contractors: Omori Construction + NERF Co., Ltd.
Architects:

Masahiro Katsuki (SIA First-Class Architect Office)

Taiki Ogawa (Up Housing Co., Ltd.)

Program: Office + Model House
Occupants: Couple + one daughter
Address:
2-1-5 Jūsō-Motoimazato, Yodogawa-ku, Osaka City, Osaka Prefecture
532-0028 Japan

Item Value
Site Area 66.92 ㎡
Building Coverage Ratio 80%
Floor-Area Ratio 300%
Building Area 50.77 ㎡
Total Floor Area 135.09 ㎡
Actual BCR 75.86%
Actual FAR 161.49%
Finishes / Insulation Cellulose fiber, Neomazeus

BELS Evaluation Report

(Translation)

Applicant Information

Project Address:
103 Shin-Kitano, Parknard Shin-Kitano, 6-23, Shinkitano 2-chome, Yodogawa-ku, Osaka

Applicant / Owner:
Up Housing Co., Ltd. — Mr. Ogawa

We hereby certify that the project described below has been evaluated under the BELS (Building-Housing Energy-efficiency Labeling System).
This label indicates that energy-efficiency performance has been third-party assessed based on application documents.
Please note that if changes such as design modifications occur after issuance, the assessment results may differ.

Project Information

Location:
2-12-2 Jūsōhonmachi, Yodogawa-ku, Osaka City

Building Use:
Residential (Low-rise collective housing)

Building Conditions:

Floors: 2 above ground

Structure: Wooden construction

Total Floor Area: 113.13 m²

Expected Completion: Early May 2022

Residential Unit Evaluated:
Detached single-family residence

Evaluation Results
BELS Rating

★★★★★ (5 Stars)

Energy Efficiency Assessment
Primary Energy Consumption
Item Value
Design Primary Energy Consumption (Exterior included) 612 MJ/m²·year
Standard Primary Energy Consumption (Exterior included) 417 MJ/m²·year
Achievement Ratio 0.68
Item Value
Design Primary Energy Consumption (Exterior excluded) 946 MJ/m²·year
Standard Primary Energy Consumption (Exterior excluded) 1,489 MJ/m²·year
Achievement Ratio 0.64
ZEH-Oriented Evaluation

This building complies with:

Residential ZEH-Oriented Specification

Applicable under MLIT Notice No. 43

Notes:
ZEH = Net Zero Energy House.
A ZEH is a house designed to achieve zero annual primary energy balance through high insulation performance and renewable energy systems.
This project satisfies performance requirements for ZEH-Oriented housing, which is suitable for regions where photovoltaic installation may be difficult (e.g., dense urban conditions).

Equivalent Annual Primary Energy Reduction:
23% improvement

Certification

Evaluation Date: April 18, 2022
Certification No.: 29-00-2022-00311
Evaluator:
Housing & Building Energy Efficiency Evaluation Organization
Inspector: Hisashi Kubo

Seal: BELS Registered Institute