DK Co.,Ltd.

DK Co.,Ltd. (株式会社ディーケー) is a Japanese digital marketing and advertising agency headquartered in Kumamoto City, Kumamoto Prefecture. The company was established on July 3, 2023 (Reiwa 5) with capital of 3,000,000 yen, and is led by Representative Director Daisuke Koga. Its office is located on the second floor of the DK Building in Minami-ku, Kumamoto. The firm positions itself around the concept of designing digital marketing outcomes, aiming to install a structure that generates results into every business setting. Its service portfolio spans five main areas: advertising operations, SEO, advertising agency/representation, content production, and paid employment placement. In advertising operations, DK handles strategy planning, media selection (including Meta and TikTok), creative production, ongoing optimization, reporting, and landing page optimization support. Its SEO service covers keyword research, competitive analysis, content design, on-page measures, link acquisition, and access analysis. The advertising agency business acts as a bridge between advertisers and media, supporting media strategy, placement negotiation, and performance measurement. The content business develops original characters, illustrations, LINE stickers, merchandise design, and social/web content. Finally, the paid employment placement service focuses on digital, marketing, and media roles, supporting both job seekers and employers from application through post-hire retention. DK Co.,Ltd. operates primarily in the Japanese market, with a strong regional base in Kumamoto while serving clients across various industries. The company holds a paid employment placement license (number 43-ユ-300269). It remains a privately held company and does not disclose a parent company or group affiliation. Its stated vision emphasizes results as the criterion for all decisions, favoring outcomes over position, judgment over intuition, and change over convention.

DK Co.,Ltd. was established on July 3, 2023, in Kumamoto City, Japan, during the Reiwa 5 era. The company was founded with a capital of 3,000,000 yen and is led by Representative Director Daisuke Koga. From its inception, DK has focused on digital marketing and advertising services, aiming to provide integrated solutions that drive measurable results for clients. The company operates from the DK Building in Minami-ku, Kumamoto, and has built a service portfolio that includes advertising operations, SEO, advertising agency services, content production, and paid employment placement. Its advertising operations cover major platforms such as Meta and TikTok, while its SEO services encompass keyword research, competitive analysis, content design, and link building. The content business develops original characters, illustrations, LINE stickers, and merchandise, and the employment placement service specializes in digital, marketing, and media roles. DK holds a paid employment placement license (number 43-ユ-300269), allowing it to legally operate its recruitment services. The company remains privately held and has not disclosed any parent company or group affiliation. As of its public disclosures, it continues to operate as an active digital marketing agency based in Kumamoto, serving clients across Japan.

• DK Co.,Ltd. was established in Kumamoto City, Japan.

A results-driven digital marketing partner that designs outcome-generating structures for businesses, combining advertising, SEO, content, and talent services.

• Advertising Operations

  End-to-end digital advertising operations including strategy, media selection (Meta, TikTok), creative production, optimization, reporting, and LPO support.

• SEO Services

  SEO strategy, competitive research, keyword analysis, content design, on-page measures, link acquisition, and access analysis.

• Advertising Agency

  Acts as a bridge between advertisers and media, supporting media strategy, placement negotiation, and performance measurement.

• Content Production

  Original character development, illustrations, LINE stickers, merchandise design, and social/web content production.

• Paid Employment Placement

  Recruitment services focused on digital, marketing, and media roles, supporting job seekers and employers from application to retention.

1. 1株式会社DK | ビジネスの課題をテクノロジーで解決dk311.jp
2. 2会社概要 | 株式会社DKdk311.jp
3. 3サービス | 株式会社DKdk311.jp
4. 4DK Co.,Ltd. - Wikidatawikidata.org