We will start developing a carbon calculator together with 11 companies from the Event Industry Promotion Association.

Tanseisha Co., Ltd. (Head office: MINATO CITY Tokyo / Director: Osamu Kobayashi / hereinafter referred to as Tanseisha), which creates spaces for commercial and cultural facilities, has begun developing an industry standard carbon calculator for event activity processes together with 11 member companies of the Japan Event Industry Promotion Association (Chiyoda-ku, Tokyo / Chairman: Tadashi Ishii).

Companies are already beginning to voluntarily adopt the Sustainability Disclosure Standards published by the Sustainability Standards Board of Japan (SSBJ) on March 5, 2025. In response to this movement, the event industry has also begun to actively engage in carbon calculators, but there are cases where the measured values for the same event vary greatly due to differences in the materials used for measurement and the measurement range, making goal setting unclear.

To solve these problems, volunteers from the Japan Event Industry Promotion Association came together to develop a highly transparent carbon calculator that would give the same calculation results regardless of which company measured it. We believe that by bringing together companies in the event industry and working on co-creation actions, we can increase the value and appeal of events more than ever before, and contribute to the sustainable development of the industry.

[Aim of developing the Carbon Calculator]

Conventional carbon calculators often use a calculation method that converts materials into monetary terms. However, in order to achieve more accurate calculations and to make it easier to consider reduction plans after calculations, we thought that a carbon calculator that uses calculation methods that are less likely to vary depending on the person making the measurement, such as weight conversion, would be optimal. Based on this idea, we decided to develop a new carbon calculator based on the carbon measurement online platform "SUSTAINABLE ENGINE CARBON SIMULATOR" *1 developed by Hakuhodo Products Inc. We will continue to develop the calculator with the goal of releasing a demo version within fiscal year 2025 so that it can be used by anyone involved in the event industry as a tool that meets sustainability disclosure standards.

*1 SUSTAINABLE ENGINE CARBON SIMULATOR:
An online carbon measurement platform provided by SUSTAINABLE ENGINE, a project team of Hakuhodo Product's Inc., that can precisely measure and visualize CO2 emissions in the event sector. It calculates in detail the CO2 emissions and recycling rates from the production process to disposal of an event, supporting the planning of Environmental Consideration events.
https://www.h-products.co.jp/topics/entry/n/2024/06/24/140000

News Release
Standardization of carbon calculators in the event industry
Development begins with 12 member companies of the Japan Event Industry Association (JACE)

[List of participating companies]

*In alphabetical order
・ZEAL Associates Co., Ltd. https://zeal-as.co.jp/
Address: 8F JRE Ginza 1-chome East Building, 1-19-7 Ginza Chuo City, Tokyo
Representative: Representative Director Daisuke Nagato

・JTB Communication Design Co., Ltd. https://www.jtbcom.co.jp/
Address: 12th floor, Celestine Shiba Mitsui Building, 3-23-1 Shiba MINATO CITY, Tokyo
Representative: President and Director Takayuki Fujiwara

・Shoei Bijutsu Co., Ltd.https://www.shoei-bijutsu.co.jp/
Address: 25F St. Luke's Tower, 8-1 Akashicho Chuo City, Tokyo
Representative: President and Chief Executive Ofcer Kobayashi Daiki

・Cerespo Co., Ltd.https://www.cerespo.co.jp/
Address: 1-21-5 Kitaotsuka Toshima City Tokyo
Representative: Director Tsuyoshi Tashiro

・ TANSEISHA Co., Ltd.://www.tanseisha.co.jp/
Address: Shinagawa Season Terrace 19F, 1-2-70 Konan MINATO CITY Tokyo
Representative: Osamu Kobayashi President and Chief Executive Ofcer

・TOW Co., Ltd.https://tow.co.jp/
Address: 3F Hulic Kamiyacho Building, 3-3-13 Toranomon 4-chome, MINATO CITY Tokyo
Representative: President and Chief Executive Ofcer Kenichi Muratsu

・ DENTSU INC. https://www.dentsulive.co.jp/
Address: Dentsu Ginza Building, 7-4-17 Ginza Chuo City, Tokyo
Representative: Masahiko Takagi, President and Director

・Nomura Co., Ltd. https://www.nomurakougei.co.jp/
Address: 2-3-4 Daiba, MINATO CITY, Tokyo
Representative: President and Director Kiyotaka Okumoto

・Hakuten Co., Ltd.https://www.hakuten.co.jp/
Address: 20F Tokyo Square Garden, 1-1 Chuo City 3-chome, Chuo-ku, Tokyo
Representative: Jun Harada, Director and COO

・Hakuhodo Products Inc. https://www.h-products.co.jp/
Address: NBF Toyosu Garden Front, 5-6-15 Toyosu, Koto-ku, Tokyo
Representative: Masakazu Hashimoto President and Chief Executive Ofcer

・Frontier International Co., Ltd. https://www.frontier-i.co.jp/
Location: NBF Shibuya East, 3-3-5 Shibuya, Shibuya-ku, Tokyo
Representative: Yasuhiro Kawamura President and Chief Executive Ofcer

・Murayama Co., Ltd. https://www.murayama.co.jp/
Location: Toyosu Foresia 3-2-24 Toyosu, Koto-ku, Tokyo
Representative: President and Chief Executive Ofcer Tomasa Saiki

[Industry standard carbon calculator development partner company]

・Members Co., Ltd. Decarbonization DX Company https://ddx.members.co.jp/
Address: 37th floor, Harumi Island Triton Square Office Tower X, 1-8-10 Harumi, Chuo-Chuo City, Tokyo
Company President: Naoki Nishizawa
Overview: The Decarbonization DX Company was established in April 2023 as a specialized organization for realizing a decarbonized society. GX personnel with digital skills and LCA and Scope 1, 2, and 3 calculation skills will accompany the project's council management support (Project Management office/PMO support) and support for optimizing calculation logic, and will support the standardization of carbon calculators.