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DEISO — Tokyo-based sustainability operating systems for enterprises, suppliers, and public sustainability bodies

Reach the DEISO team for enterprise engagements, technical review, capacity building, and partnership programs. Written inquiries receive a response within one business day.

Business hours

Monday–Friday · 9:00–17:00 JST
Closed on Japanese public holidays.

Work inquiries

For proposals, quotations, and enterprise engagement.

info@dei.so →

Head office · Tokyo

English

Level 21, Shiodome Shibarikyu Building
1-2-3 Kaigan, Minato-ku
Tokyo 105-0022, Japan

日本語

〒105-0022
東京都港区海岸1-2-3
汐留芝離宮ビルディング 21階
合同会社DEISO

DEISO office and meeting venue — Level 21, Shiodome Shibarikyu Building, Tokyo

WhatsApp

Direct chat with a DEISO agent. Messages left outside business hours are answered the next business day.

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DEISO Mirai AI

AI-supported assistant for preliminary scoping, service routing, and standards references.

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Contact Info.

English Address:
Level 21 Shiodome Shibarikyu Building
1-2-3 Kaigan, Minato-ku
105-0022 Tokyo, Japan.

Japanese Address:
〒105-0022 東京都港区海岸1-2-3
汐留芝離宮ビルディング21階, 合同会社DEISO.

Phone (JP): 03-5403-6479 / 0488-72-6373
Phone (EN): 070-6969-7700
Fax: 03-5403-6475 / 0488-72-6373
Email: info@dei.so

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