Announced details
Internal communications, information sharing, daily reports and operation logs, training, internal education, and organizational engagement
Annual cost savings of approximately ¥2 million; average monthly overtime of 20–25 hours per person has fallen to 30 minutes or less for nearly all employees
TUNAG is used by 1,400 companies, with more than 1.5 million users (as of June 2026)
A business relationship in which ヤマトカンキョウ株式会社 uses TUNAG provided by Stmn,Inc.
Head office: Saga City, Saga Prefecture; President and Representative Director: Makise Masakazu (牧瀬 正和); provides infrastructure services centered on water utility operations; in business for more than 60 years
In this announcement the company addresses none of Contract Value / Offering price / Impact on Business Performance.
| Item | Details |
|---|---|
| Names of Products / Services Covered | TUNAG (member engagement platform) |
| Counterparty | ヤマトカンキョウ株式会社 |
| Counterparty overview | Head office: Saga City, Saga Prefecture; President and Representative Director: Makise Masakazu (牧瀬 正和); provides infrastructure services centered on water utility operations; in business for more than 60 years |
| Relationship with the Company | A business relationship in which ヤマトカンキョウ株式会社 uses TUNAG provided by Stmn,Inc. |
| Applicable area | Internal communications, information sharing, daily reports and operation logs, training, internal education, and organizational engagement |
| Quantitative Effects | Annual cost savings of approximately ¥2 million; average monthly overtime of 20–25 hours per person has fallen to 30 minutes or less for nearly all employees |
| Usage history | TUNAG is used by 1,400 companies, with more than 1.5 million users (as of June 2026) |
Items this document does not state (11)
These are items the company does not state in this document. We do not leave them blank, nor fill them in from other sources or by inference.
The reasons the company gives
The company's own explanation, not something inferred from the numbers.The company digitized the completion of paper daily reports, the collection of seals from multiple supervisors, waiting for approvals, and overtime after returning to the office for administrative work, moving to smartphone-based approvals.