The EVENT CARBON SIMULATOR, a carbon calculator developed through the collaborative efforts of the event industry, is now in operation.

TANSEISHA Co., Ltd., in collaboration with development partner companies affiliated with the Japan Event Industry Promotion Association (JACE) (located in Chiyoda-ku, Tokyo; Chairman: Tadashi Ishii), has completed the development of the main functions of "EVENT CARBON SIMULATOR," an industry-standard carbon calculator for event activity processes, which has been under development since June 2025. Following this, a "Works Working Group" has been formed with 15 JACE member companies, and we are pleased to announce that we have begun trial operation in preparation for a future public release.

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*Trademark registration application planned

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[Background of Development: Responding to Sustainability Disclosure and Industry Challenges]

Following the Sustainability Standards Board of Japan's (SSBJ) phased implementation of mandatory information disclosure starting in the fiscal year ending March 2027, understanding and disclosing companies' greenhouse gas (GHG) emissions has become an unavoidable management issue. In particular, disclosure of the entire supply chain (Scope 3) is expected to be included in the future, and discussions on establishing standards for this are beginning in various forums.

In the event industry, too, securing quantitative and objective evidence (basis for calculation) that can withstand future disclosure requests has become an urgent issue in these uncertain circumstances. Against this backdrop, this calculator was designed with the utmost priority on consistency and reproducibility of calculations, taking a comprehensive view of the process from planning and production to the actual event and its conclusion, ensuring that "the same results are obtained regardless of who performs the measurement."

News Release
The 'EVENT CARBON SIMULATOR,' a carbon calculator developed through collaboration within the event industry, has launched.
~JACE member companies establish an operational working group and begin field testing~

[Main features of the EVENT CARBON SIMULATOR]

• High-precision calculation based on "weight"
Instead of the conventional "monetary basis" method, which has a large margin of error, we have adopted a calculation method that is based on "weight," which reduces calculation errors. This makes it possible to provide more objective and transparent evidence (basis for calculation).
Establishment of industry standard rules
Instead of relying on individual company standards, a common calculation rule for the industry will be established through JACE. This rule is based on the "SUSTAINABLE ENGINE CARBON SIMULATOR" launched by HAKUHODO PRODUCT'S INC. in June 2024. This will enable comparative analysis across events and the setting of reduction targets for the entire industry.

[Future Roadmap]

We will begin trial operation in April 2026, verifying usability and accuracy based on actual field data. We will continue our efforts with the goal of making it publicly available in the future, incorporating the results of this trial.

[Vision of the Operations Working Group]

Through this calculator, we aim to create a healthy competitive environment where companies in the event industry can compete on a level playing field, striving to reduce environmental impact and improve design quality. By elevating sustainability initiatives from individual company efforts to industry standards, we will contribute to fostering a sustainable event culture.

[List of companies belonging to the Operations Working Group]

*In alphabetical order
ARTFREAK Inc. https://artfreak.co.jp/
Location: PMOEX Nihonbashi Kayabacho 9F, 2-12-10 Nihonbashi Kayabacho Chuo City Tokyo
Representative: Takuya Komada, Representative Director

IZUMI SENKOSHA Inc. https://www.izmi.bz/
Location: 6-22-6 Nishi-Nippori, Arakawa-ku, Tokyo
Representative: Shintaro Oku, President and Chief Executive Ofcer

ADK Creative One Inc. https://www.adkco.jp/
Location: Toranomon Hills Mori Tower, 1-23-1 Toranomon MINATO CITY, Tokyo
Representative: Kenji Morinaga, President and Chief Executive Ofcer

ZEAL Associate Corp.https://zeal-as.co.jp/
Location: 8F, JRE Ginza 1-chome East Building, 1-19-7 Ginza Chuo City, Tokyo
Representative: Daisuke Nagato, Director CEO

・ JTB Communication Design, Inc. 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

・ 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 LIVE INC. https://www.dentsulive.co.jp/
Location: Dentsu Headquarters Building, 1-8-1 Higashi-MINATO CITY, Minato-ku, Tokyo
Representative: Masato Nakamura, President Director CEO

Tohgashi Co., Ltd. https://www.tohgashi.co.jp/
Location: Sumitomo Shintomi Building 2F, 2-14-4 Shintomi, Chuo City, Tokyo
Representative: President and Chief Executive Ofcer Morikatsu Yoshida

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

・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

Fujiya Co., Ltd. https://www.fujiya-net.co.jp/
Location: 7-4, Higashi Horikawa-dori, Marutamachi-sagaru, Nakagyo-ku, Kyoto City
Representative: Tomoyuki Nagata, President and Chief Executive Ofcer

・MASH CORPORATIONhttps://www.mash-japan.com/
Location: 7F, Commercial Building, 5-6-10 Toyosaki, Kita-ku Osaka City
Representative: Yoshiki Mato, Representative Director

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

Ray Corporation https://ray.co.jp/
Location: Harks Roppongi Building, 6-15-21 Roppongi MINATO CITY, Tokyo
Representative: Yoichi Isobe President and Chief Executive Ofcer