https://tsukunobi.com/tsukunobinews/%e6%9d%b1%e4%ba%ac%e9%83%bd%e7%84%a1%e9%9b%bb%e6%9f%b1%e5%8c%96%e3%80%81%e6%96%b0%e8%a6%8f%e7%9d%80%e6%89%8b320km%ef%bc%8b%e4%ba%8b%e6%a5%ad%e4%b8%ad405km%ef%bc%9d%e9%83%bd%e9%81%93725km%e3%81%abツクノビ建設ニュースja2026-05-20T17:36:16+09:00東京都無電柱化、新規着手320km＋事業中405km＝都道725kmに https://tsukunobi.com/tsukunobinews/construction-companies-483823-year-on-year-123-changeツクノビ建設ニュースja2026-05-19T12:44:31+09:00全国48万3,823者・前年比+123のみ、業者数の入れ替わりが加速