Ohmsha

「資格」と「実務」をつなぐ技術者のためのウェブマガジンです。現場のノウハウをはじめ、電験や電気工事士、ビル管理士などのライセンス、法令関係から教育、経営、新製品まで、スキルアップにつながる最旬トピックスを満載してお届けします。 100年以上にわたり、理工学分野の書籍・雑誌の発行で培ってきたノウハウを活かした学習コンテンツを配信しています。講義映像は、書籍の中でも特に重要なポイントを厳選しており、より効率的に学習を進められる構成となっています。 電気の現場で仕事をこなす技術者が抱く「?」を基礎から徹底的に解説する「現場のギモン、超解決塾」。今回は、変流器や計器用変圧器に使われる「零相」のギモンに迫ります。 合格率15%の難関、ITストラテジスト試験合格を目指すならこのオンライン講座!試験対策書籍の著者・林雄次先生が、論述対策のテクニックを動画で伝授。 オーム社ウェブショップでは、スキルアップ・資格取得に役立つ様々な書籍・雑誌や工具を取り揃えています。ぜひラインナップをご覧ください。

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Country (Wikidata; date unspecified)

Stated by a public source

Japan

Wikidata Q11293513 property P17. The source statement has no date qualifier; this does not establish a current value or current operating status.

Deterministically projected from an identity-matched Wikidata record. Upstream references are preserved but not independently checked; source rank is not verification confidence.

Rule checked 2026-10-17 · Review due 2027-01-15 · Version 1

Inception (Wikidata)

Stated by a public source

1914

Wikidata Q11293513 property P571. Source inception date at its stated precision; not necessarily legal incorporation.

Deterministically projected from an identity-matched Wikidata record. Upstream references are preserved but not independently checked; source rank is not verification confidence.

Rule checked 2026-10-17 · Review due 2027-01-15 · Version 1

Legal form (Wikidata; date unspecified)

Stated by a public source

kabushiki gaisha

Wikidata Q11293513 property P1454. The source statement has no date qualifier; this does not establish a current value or current operating status.

Deterministically projected from an identity-matched Wikidata record. Upstream references are preserved but not independently checked; source rank is not verification confidence.

Rule checked 2026-10-17 · Review due 2027-01-15 · Version 1

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