RSM Shiodome Partners SR Co. today announced a merger with Hiyama Labor Affairs Consulting Office, effective January 1, 2025. Concurrently, Kazufumi Zamma, formerly of Hiyama Labor Affairs Consulting Office, has been appointed as a Partner of RSM Shiodome Partners.

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About the Merger:

RSM Shiodome Partners SR Co. and Hiyama Labor Affairs Consulting Office have long supported our clients' growth and development through high-quality professional services. To better serve large-scale clients and further elevate the quality of our offerings, we are pleased to announce our decision to merge.

Merger Details:

  • Agreement Date: November 25, 2024
  • Effective Date: January 1, 2025
  • Location: RSM Shiodome Partners SR Co. will maintain its headquarters at 33F, Shiodome City Center, 1-5 Higashishinbashi, Minato-ku, Tokyo.
  • URL: https://shiodome.co.jp/sps/

Overview of Both Firms:

RSM Shiodome Partners SR Co.

  • Location: 33F, Shiodome City Center, 1-5 Higashishinbashi, Minato-ku, Tokyo
  • Representative: Satoshi Sekiguchi
  • Date of Establishment: September 2020
  • Corporate History: Satoshi Sekiguchi founded SP Social Insurance Labor Consultant Office in September 2016. In September 2020, the office was incorporated as Shiodome Partners SR Co.. As a proud member of RSM International, the firm delivers high-quality business solutions focused on human resources and labor management in Japan.

Hiyama Labor Affairs Consulting Office

  • Location: 96-17 Toyooka, Kitahiyama-ku, Setana-cho, Kudo-gun, Hokkaido
  • Representative: Kazufumi Zamma
  • Date of Establishment: October 2019
  • Corporate History: Kazufumi Zamma founded Hiyama Labor Affairs Consulting Office in October 2019 in Setana-cho, Hokkaido. The office primarily offered services such as human resources and labor management procedures, consulting, and corporate law, supporting numerous clients across southern Hokkaido. In January 2025, it merged with RSM Shiodome Partners SR Co. to enhance its capabilities and expand its service offerings.

Profile of New Partner

Kazufumi-Zamma

Kazufumi Zamma

Certified Social Insurance Labor Consultant and Administrative Scrivener

With extensive experience in the human resources and labor field across various companies, he established himself as an independent business owner. His expertise spans a wide range of areas, including labor management consulting, labor audits, drafting employment regulations, and providing comprehensive human resources and labor advisory services. In January 2025, following the merger with Hiyama Labor Affairs Consulting Office, he was appointed as a partner at RSM Shiodome Partners SR Co..
 

Key Highlights and Organizational Structure:

RSM Shiodome Partners SR Co. remains committed to delivering high-quality services to listed companies, their subsidiaries, pre-IPO companies, and foreign-affiliated businesses. We will also continue to expand our offerings for clients engaged in cross-border operations. As a team of experts providing unique, one-stop solutions, we embrace a global perspective, leverage advanced technologies, and collaborate with our clients to adapt to the ever-evolving business landscape.

Following the merger, RSM Shiodome Partners SR Co. will operate under the leadership of four dedicated partners:

Partners and Certified Social Insurance Labor Consultants: Satoshi Sekiguchi, Keisuke Takahashi, Kazufumi Zamma, Masakazu Yamaoka

By merging with Hiyama Labor Affairs Consulting Office and welcoming a new partner, we are poised to even better serve our clients. We are committed to leveraging our combined strengths to deliver exceptional service and remain a trusted advisor for years to come. We appreciate your continued trust and support.

Inquiries Regarding This Press Release

For inquiries regarding this press release, please contact the following:

【RSM Shiodome Partners】

MAIL: inquiry-jp at rsmsp.jp (Please replace "at" with @)