ID&E Holdings
Japanese construction and power engineering business
ID&E Holdings (formerly Nippon Koei Co., Ltd. (日本工営株式会社)) is a Japanese engineering consulting company, founded on 7 June 7, 1946, and headquartered in Chiyoda, Tokyo, Japan. It is the oldest independent consulting firm in Japan.
It was founded by Yutaka Kubota.
ID&E Holdings was created as part of a company reorganisation in July 2023. It has numerous subsidiaries, the main ones including Nippon Koei Co Ltd, Nippon Koei Urban Space Co Ltd, Nippon Koei Energy Solutions Co Ltd, Nippon Koei Business Partners Co Ltd, and British architectural firm Building Design Partnership.
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Vocabulary and entity names are the principal evidence signals here, because they determine the precision of every later search. The source revision retrieved here is dated Dec 21, 2025. The linked authority identifier is Q11507991. VIAF identifies the subject as 134974982. The Library of Congress control number is n88141153. 1 of 4 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank. The first chronological checks are 1946 and 2023.
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This entry incorporates text from “ID&E Holdings” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.