![Koichi Sugiyama](data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="%231b1b1b" class="bi bi-person-fill" viewBox="0 0 16 16"><path d="M3 14s-1 0-1-1 1-4 6-4 6 3 6 4-1 1-1 1zm5-6a3 3 0 1 0 0-6 3 3 0 0 0 0 6"/></svg>)
Koichi Sugiyama
Founder at
PLAN DO CO., LTD.
Net worth: 23 M $ as of 31/12/2025
Known holdings in public companies
| Company | Date | Number of shares | Valuation | Valuation date |
|---|---|---|---|---|
PLAN DO CO., LTD. 89.7% | 27/11/2025 | 2,528,260 ( 89.7% ) | 23 M $ | 31/12/2025 |
Koichi Sugiyama active positions
| Companies | Position | Start |
|---|---|---|
| PLAN DO CO., LTD. | Founder | 10/04/2003 |
Experiences
Positions held
Active
Inactive
Listed companies
Private companies
Connections
3
1st degree connections
1
1st degree companies
Male
Female
Members of the board
Executives
Linked companies
| Private companies | 1 |
|---|---|
PLAN DO Co., Ltd.
 PLAN DO Co., Ltd. Real Estate DevelopmentFinance Provides real estate sales, consulting and management & building renovation and remolding services | Finance |
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- Koichi Sugiyama
