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The system maintenance of the Diamond Executive Club website has been ongoing for an extended period, causing inconvenience due to overlapping PHP vulnerability fixes and renewal work. We announced the information on November 10, but please wait a while for event registration and My Page viewing as we are adjusting the database. We apologize for the inconvenience and thank you for your understanding.
The Monthly Information of Weekly Diamond introduces five companies: Sea Hones Co., Ltd., which develops nursing beds; Ogiya Co., Ltd., a specialty trading company for non-ferrous metals; and Earth Pet Co., Ltd., which handles pet products, among others. Each company presents its business activities and the vision of its management. They offer unique technologies and products or services tailored to market needs, thereby enhancing their competitiveness within the industry.
Five new companies joined the Diamond Executive Club in October 2026. Details can be found on the official website.
This article introduces the founding year, capital, number of employees, and sales of Hansan Beauty Co., Ltd., Rio Consulting Co., Ltd., and Imedeya Co., Ltd., and briefly summarizes their positioning within the industry and business content.
Four new companies joined the Diamond Executive Club in September 2026. Details can be found on the official website.
The Weekly Diamond released on August 24 features Shizuoka Prefecture and introduces five companies. It includes Mikat Holdings, which promotes "Zero Waste," Kimura Beverage, which produces unique drinks, and Long Life Group, which operates 16 stores in the western region. The overview includes each company's business activities and performance.
Eight new companies joined the Diamond Executive Club in August 2026. Details can be found on the official website.
The July 2026 Monthly Information of Weekly Diamond featured five companies: Aoki Asunaro Construction, a rapidly growing specialty general contractor in the civil engineering sector; Seven Dreams Group, expanding in healthcare, nursing, and beauty; and Gekiden Software, growing in automotive, communications, and infrastructure development. Basic information such as founding year, capital, number of employees, and revenue for each company is included.
Four new companies joined the Diamond Executive Club in July 2026. Details can be found on the official website.
In the Weekly Diamond Monthly Information, five companies, including Startia Holdings Co., Ltd. and Tai Ki Co., Ltd., were featured. Startia Holdings supports DX and productivity improvement for SMEs and is listed on the Tokyo Stock Exchange Prime market. Tai Ki Co., Ltd. is globally recognized as an OEM manufacturer of cosmetic tools, founded in 1930.