Contact
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 programmes. Written enquiries receive a response within one business day.
Business hours
Monday–Friday · 9:00–17:00 JST
Closed on Japanese public holidays.
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
Access & directions
Route guides from Narita and Haneda, nearest stations, and lobby entry.
Visit the access page →
Direct lines
Direct chat with a DEISO agent. Messages left outside business hours are answered the next business day.
Open WhatsApp chat →DEISO Mirai AI
AI-supported assistant for preliminary scoping, service routing, and standards references.
Ask Mirai →
