https://kousuijihanki.jp/works/元米国三井住友信託銀行社長半田哲也がcfoに就任しました 2025-09-19 https://kousuijihanki.jp/works/future-business-summit-2026 2025-10-09 https://kousuijihanki.jp/works/serbia-investment-conference-2025 2025-09-19