白潟総合研究所株式会社 News Releases

[Shiragata Research Institute x Keiei Sanbo] Shiragata Welcomes the Beloved Executive Community 'Sanbo' into Its Group for Joint Operation. Maintaining President Shintani's 'Ultimate Haven' While Creating New Synergy

Shiragata Research Institute has acquired the executive community business 'Sanbo' from Keiei Sanbo … · 2026-04-02

[Shiratoga Research Institute x Keiei Sanbo] Shiratoga Research Institute Welcomes "Sanbo," a Community for Business Owners They Admired, into its Group for Joint Operation. While Preserving the "Best Place to Be" Created by Representative Shintani, a New Synergy Emerges.

Shiratoga Research Institute and Keiei Sanbo Co., Ltd. have transitioned to a joint operation system… · 2026-04-02

[Shiratoga Research Institute x Keiei Sanbo] Shiratoga Research Institute Welcomes "Sanbo," a Community for Business Owners They Admired, into its Group for Joint Operation. While Preserving the "Best Place to Be" Created by Representative Shintani, a New Synergy Emerges.

Shiratoga Research Institute and Keiei Sanbo Co., Ltd. have transitioned to a joint operation system… · 2026-04-02