Contact Information
Need help or want to collaborate? Our team is available through live chat, Email, AI assistant, messaging platforms, phone, and in-person access from our Tokyo headquarters.
Business Hours
Monday-Friday, 9:00-17:00 JST (Except Japanese Public Holidays).
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 (Japanese)
WhatsApp chat
Prefer to chat on WhatsApp? You can reach our agents directly via WhatsApp for any inquiries, assistance, or personalized recommendations. Whether you want to discuss your project needs or explore our premium training programs, we're here to help. Contacting us outside business hours? Just leave your message, and one of our agents will get back to you as soon as possible.
Phone (EN)
070-6969-7700 (English)
Fax
03-5403-6475
AI Assistant
Have a quick question about DEISO’s services, digital products, or training programs? Whether you need support for a project, help with environmental legislation, or personalized recommendations—Mirai AI is here to assist. Use Mirai to explore our website, find the right service or product, and get instant answers.
