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  5. Photovoltaic power generation system (solar system, energy-saving housing, electricity sales business)
  6. Energy-saving calculation / BELS application

Energy-saving calculation / BELS application

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We will conduct energy-saving calculations for newly built houses and assist in obtaining the BELS evaluation certificate.

last updated:Aug 20, 2025

在住ビジネス 本社
在住ビジネス 本社
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Leave the energy-saving calculations for new houses and obtaining the BELS evaluation certificate to us!

The law regarding the improvement of energy consumption performance in buildings (hereinafter referred to as the Building Energy Efficiency Act) has been amended, and from April 2025, compliance with energy-saving standards will be mandatory for all new residential buildings. Our company handles two aspects for new residential buildings: [Energy-saving calculations] and [Acquisition of BELS evaluation certificates]. We conduct nearly 200 energy-saving calculations each month and have a track record of calculating 2,000 new residential buildings annually. For energy-saving calculations and the acquisition of BELS evaluation certificates, please leave it to our business!

    Photovoltaic power generation system (solar system, energy-saving housing, electricity sales business)
省エネ計算

Energy-saving calculation / BELS application

省エネ計算 BELS申請.png
省エネ計算 BELS申請.png
  • Related Link - https://zaijubiz.jp/service/bels/

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basic information

1. Energy-saving calculations (for new residential buildings) …We support "envelope calculations" and "primary energy consumption calculations" for new residential buildings. 2. Acquisition of BELS evaluation report …We will handle inquiries during the acquisition of the BELS evaluation report. *The application destination will be House Plus Housing Guarantee Co., Ltd.

Price range

P2

Delivery Time

P3

※It may vary depending on the content, so please feel free to contact us.

Applications/Examples of results

New construction achievements: 2,000 units per year We conduct energy-saving calculations for nearly 200 units each month, and we have a track record of calculating 2,000 new residential units annually.

Detailed information

  • 省エネ計算

    The evaluation of the energy-saving performance of residential buildings is based on two criteria: "envelope performance standards" and "primary energy consumption."

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Zainyu Business Co., Ltd. Company Information / Business Introduction

Zainyu Business Co., Ltd. Company Information / Business Introduction

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Exhibitor Seminar Information

Energy Conservation Law Revision and Seminar on the Reduction of Special Case No. 4

  • Seminar・Event

Zai Ju Business Co., Ltd. will be exhibiting at the "Japan Home Show & Building Show" held at Tokyo Big Sight from November 20 (Wednesday) to November 23 (Friday), 2024. We are scheduled to hold a two-day seminar presentation during the "Exhibitor Seminar" planned for the event. 【Exhibitor Seminar Information】 ――――――――――――――――――――――――――――― Date and Time: November 21, 2024 (Thursday) 11:30–12:00 Seminar Title: "Reviewing the Revision of the Energy Conservation Law for Buildings!" Finally coming into effect next April! An explanation along with the energy performance labeling system! Location: Solution Seminar Room (inside Hall 2) ――――――――――――――――――――――――――――― Date and Time: November 22, 2024 (Friday) 11:45–12:15 Seminar Title: "What Changes with the Reduction of Special Case 4!?" Finally coming into effect next April! Important revisions to the Building Standards Act to know Location: JHBS Stage C (inside Hall 2) ――――――――――――――――――――――――――――― Please register in advance to attend the seminar at the URL below.

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Free online seminar "Is that so? Mandatory efforts that must be made?! Start of the energy-saving performance display system" will be held on July 23, 2024 (Tuesday) from 13:30 to 14:00!

  • Seminar・Event

The residential business will hold a free online seminar titled "Is that so? The obligation to make efforts that must be done? The start of the energy-saving performance labeling system" on July 23. The "Energy-Saving Performance Labeling System" will begin in April 2024. Since the obligation to make efforts only applies to sales and rental businesses, do you think "custom-built homes are not related"? From the perspective of homeowners, it is becoming a time where it is not "I don't have to do it because it's an obligation!" but rather "If I'm buying a house, I want one with an energy-saving performance label!" Now that the times are demanding it, we will review the "amendment to the Energy Conservation Law" and explain the "Energy-Saving Performance Labeling System" in an easy-to-understand manner. ≪Webinar Details≫ Date and Time: July 23, 2024 (Tuesday) 13:30–14:00 Participation Fee: Free (Pre-registration required) Participation Method: Zoom (You can enter the room 15 minutes before the start time) \ Recommended for those with the following questions / 1. What exactly is the energy-saving performance labeling system? 2. What will the obligation to comply with energy-saving standards specifically entail? 3. Is it true that there are two types of energy-saving performance labeling systems? 4. I want to address this internally, but what should I do?

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I have started a column page.

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We have started a column page aimed at those in the construction industry focused on wooden houses, as well as homeowners considering building new homes. We plan to update it regularly, so we would appreciate it if you could check back often.

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We will be exhibiting at the Tohoku Japan Building Materials Fair 2024.

  • Other・notification

We will be exhibiting at the Tohoku Japan Building Materials Fair 2024, which will be held on Thursday, June 13, 2024, at Yume Messe Miyagi (Sendai City, Miyagi Prefecture). Details are as follows: Venue: Yume Messe Miyagi Main Hall Exhibition Area ABC Time: 9:30 AM - 4:00 PM Exhibition Space: "Comfortable Living" Support Center Area Access: https://www.yumemesse.or.jp/access/

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Company information

在住ビジネス

在住ビジネス 本社

Architectural design office

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Zainju Business Co., Ltd. is developing various businesses to support housing developers. We have established a range of support systems, including structural design consulting, site surveys + government office investigations, ground service projects, and housing-related services.

Product/Service List (10)

The related categories of Photovoltaic power generation system (solar system, energy-saving housing, electricity sales business)

  • Facilities
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  • Photovoltaic power generation system (solar system, energy-saving housing, electricity sales business)
          

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