Environmental and Energy-Saving Calculation Center to Exhibit at "Real Estate DX Conference 2026" – Tokyo Midtown Hall, September 11, 2026 – With Over 5,000 Buildings Supported and Approximately 1,800 Annually

The Environmental and Energy-Saving Calculation Center (Headquarters: Toshima-ku, Tokyo; Representative Director: Keisuke Onoshi; Operating Company: HorizonXX Inc.), a specialist in energy efficiency calculations for buildings, will exhibit at the "Real Estate DX Conference 2026" (hosted by estie Inc.) to be held on September 11, 2026, at Tokyo Midtown Hall (Minato-ku, Tokyo).

In the real estate industry, awareness of energy efficiency and environmental considerations has been growing, driven by compliance with the Building Energy Efficiency Act and the expansion of ESG real estate investment. Environmental performance is no longer just a factor in efforts toward a decarbonized society, but has become a crucial evaluation criterion affecting property asset value, tenant acquisition, rental levels, and investment decisions. Under these market conditions, initiatives to improve building energy performance and obtain environmental performance certifications such as BELS, ZEB/ZEH, and CASBEE are accelerating.

The Center supports energy efficiency calculations and certification acquisition for diverse asset types, both new and existing. It has steadily expanded its order volume, achieving approximately 1,800 buildings annually and over 5,000 cumulatively. At its exhibition booth, the Center will offer consultations on energy efficiency calculations and environmental performance certifications—including certification strategies aligned with GRESB and assessing environmental performance of existing buildings—and will also introduce AI utilization support services tailored for the real estate and construction industries.

Environmental Performance Certification Real Estate Consulting AI Utilization Support Services for Real Estate and Construction Industries

About the Environmental and Energy-Saving Calculation Center

The Center supports energy efficiency calculations and acquisition of environmental performance certifications (BELS, ZEB/ZEH, CASBEE) for a wide range of asset types—including homes (detached and multi-unit), office buildings, commercial facilities, hotels, warehouses, nursing homes, hospitals, and schools—based on requests from architectural firms, developers, general contractors, real estate funds, and J-REITs.

Generally, energy efficiency calculations for existing buildings are considered more difficult than for new constructions due to incomplete availability of drawings and equipment information. The Center, however, supports both new and existing buildings. In cases where building renovations are required for certification, the Center also provides consulting on what types of renovations are necessary.

Furthermore, Representative Director Keisuke Onoshi possesses expertise in both architecture and investment management, enabling support for certification acquisition from an investment fund perspective. The Center also provides limited consultation on subsidies available for certification acquisition.

Exhibition Booth Overview

【Environmental Performance Certification Real Estate Consulting】

For those aiming to obtain certifications—whether to meet ESG investment or GRESB requirements, minimize certification costs, understand the environmental performance of existing buildings, or determine necessary renovations—the Center will propose optimal solutions.

The Center also supports environmental performance improvements across diverse asset types, including offices, logistics facilities, and hotels, regardless of whether new or existing.

【AI Utilization Support Services for Real Estate and Construction Industries】

For those considering the use of generative AI to improve efficiency in proposal creation, leverage internal knowledge, or enhance information-gathering productivity, the Center will propose tailored solutions.

Additionally, the Center welcomes consultations on AI utilization and DX advancement specifically tailored to the real estate and construction industries.

Overview of "Real Estate DX Conference 2026"

Venue: Tokyo Midtown Hall (9-7-2 Akasaka, Minato-ku, Tokyo)

Date: September 11 (Fri) 2026, 12:00–

Host: estie Inc.

Supported by: Ministry of Land, Infrastructure, Transport and Tourism; Development Bank of Japan Inc.; Japan Real Estate Institute; All Japan Real Estate Association (as of May 2026)

Attendance: 1,200 participants (developers, AM companies, PM companies, financial institutions, etc.) – based on 2025 figures

URL: https://conference.estie.jp/2026 (Registration details to be announced later by estie Inc.)

Overview of the Environmental and Energy-Saving Calculation Center

URL: https://www.ceec.jp/

Operating Company: HorizonXX Inc. URL: https://www.horizonxx.com/

Representative Director: Keisuke Onoshi

Address: 3-15-11 Minami-Ikebukuro, Toshima-ku, Tokyo 171-0022

Affiliated Associations: Tokyo Association of Architects and Building Engineers; Green Building Japan (GBJ); Real Estate for Sustainability and Energy Efficiency Development (RE-SEED); Society for Environmental Symbiotic City Planning; Society of Heating, Air-Conditioning and Sanitary Engineering of Japan; Environmental Initiative; Housing Performance Evaluation and Information Council

【Profile of Representative Director Keisuke Onoshi】

Keisuke Onoshi

Graduated from the Department of Architecture, College of Science and Engineering, and the Graduate School of Science and Engineering, Real Estate Science Program, at Nihon University. Joined a major Japanese securities company, assigned to a new business division handling real estate securitization, and engaged in real estate fund arrangement and REIT lead underwriting. Later held similar roles at a major foreign securities firm. In 2012, founded HorizonXX Inc. and became its Representative Director. Anticipating growth in the energy efficiency calculation and environmental performance certification market, launched the Environmental and Energy-Saving Calculation Center business in 2019. Currently supports energy efficiency calculations and certification acquisition for approximately 1,800 buildings annually. Also operates the "Energy Efficiency Calculation School" (an online school) to expand the workforce in this field. Author of "Practical Introduction to Real Estate and Building ESG Capable of Meeting Environmental Performance Certification" (Nihon Shokogyo Shuppan). Regular contributor to publications including the building and property management magazine "Monthly Property Management," the construction technology media "BUILT," and financial journals "Shukan Kin’yū Zaisei Jijō" and "Kin’yū Keizai Shimbun."