Shakai Hoken Roumushi Houjin CSS

Shakai Hoken Roumushi Houjin CSS (社会保険労務士法人CSS) is a Japanese labor and social insurance consultancy firm headquartered in Yodogawa-ku, Osaka. It operates as a shakai hoken roumushi houjin — a licensed corporation of labor and social security attorneys — and describes itself as a consultancy that goes beyond routine labor administration to act as a strategic partner for business owners. Its stated theme is "bringing the service Industries Closer to Social Security" (社会保障をより身近に), reflecting a focus on companies in the service sector. The firm's core service lines are social insurance procedures, payroll calculation, labor consultation, and subsidy/grant applications. Under social insurance it handles enrollment procedures, health insurance and employees' pension administration, labor insurance applications, and premium calculation support. Its payroll services cover monthly payroll, year-end tax adjustment, withholding tax management, payslip preparation, and payroll system implementation support. Labor consultation includes employment contract drafting, work rules advice, labor trouble response, harassment prevention, and compliance with labor law revisions. It also provides information on subsidies and grants, prepares application documents, analyzes eligibility conditions, and supports clients after benefits are received. CSS is led by representative partner Hidekazu Naito, a licensed specific labor and social security attorney. According to the company profile, Naito worked in human resources at a chemical products manufacturer after university, then at a management consulting firm as an HR consultant, and later served as head of HR and general affairs at a listed company, gaining experience across general affairs, legal affairs, and IT. He registered as a labor and social security attorney in 2009 and opened his own practice; in 2015 he registered as a specific labor and social security attorney. The corporate entity was established on January 4, 2018, while the practice traces its founding to September 1, 2009. The firm is based at STS Building 7F, 5-12-8 Nishinakajima, Yodogawa-ku, Osaka, near Shin-Osaka and Nishinakajima-Minamigata stations. It markets six strengths: careful interviewing, a clear fee structure, secure handling, speedy response, support backed by experience since founding, and its own self-developed cloud service. That cloud service, named "HybRid," was developed within the CSS Group and is used to provide labor management services flexibly to a wide range of clients regardless of region. The firm also states it looks beyond labor affairs into fields such as finance and inheritance, aiming to offer continuously useful information to clients. CSS publishes columns and news on its website, including a serial column for restaurant owners titled "攻める労務" (Aggressive Labor Management) launched in March 2026, and it has participated in seminars such as an ORA crisis management case presentation seminar in October 2025. Its services and content are aimed particularly at service-industry businesses such as restaurants, where labor law revisions, work-condition notices, and dismissal rules are pressing practical concerns.

Shakai Hoken Roumushi Houjin CSS traces its origins to the independent practice opened by Hidekazu Naito on September 1, 2009, after he registered as a labor and social security attorney. Naito had previously worked in human resources at a chemical products manufacturer, then as an HR consultant at a management consulting firm, and later as head of HR and general affairs at a listed company, where he gained experience in general affairs, legal affairs, and IT. In 2015 he registered as a specific labor and social security attorney, a higher qualification that allows handling of labor-management dispute resolution procedures. The corporate entity, Shakai Hoken Roumushi Houjin CSS, was established on January 4, 2018, in Yodogawa-ku, Osaka. The firm is located at STS Building 7F, 5-12-8 Nishinakajima, Yodogawa-ku, Osaka, close to Shin-Osaka Station and Nishinakajima-Minamigata Station. It operates as a shakai hoken roumushi houjin, a licensed corporation under Japanese law that provides labor and social insurance services. The firm's stated mission is "bringing the service Industries Closer to Social Security" (社会保障をより身近に), and it focuses on supporting businesses in the service sector. Its service portfolio has grown to include social insurance procedures, payroll calculation, labor consultation, and subsidy/grant applications. It emphasizes six strengths: careful interviewing, a clear fee structure, secure handling, speedy response, support backed by experience since founding, and its own self-developed cloud service. A notable development is the CSS Group's cloud-based labor management system named "HybRid," which the firm uses to provide flexible services to clients regardless of region. The firm also states that it looks beyond labor affairs into fields such as finance and inheritance, aiming to offer continuously useful information to clients. In recent years CSS has expanded its public-facing content and activities. On August 1, 2025, it renewed its website. On October 7, 2025, representative Hidekazu Naito spoke at an ORA crisis management case presentation seminar. On December 24, 2025, it announced its year-end and New Year holiday schedule. On March 16, 2026, it launched a serial column for restaurant owners titled "攻める労務" (Aggressive Labor Management), addressing practical labor issues in the food service industry, such as work-condition notices, dismissal rules, and the new育成就労 (employment development) system. The firm continues to operate from its Osaka headquarters, serving clients primarily in the service industry.

• Hidekazu Naito opens independent practice after registering as a labor and social security attorney.

• Naito registers as a specific labor and social security attorney.

• Shakai Hoken Roumushi Houjin CSS is established as a corporate entity in Osaka.

• Website renewal announced.

• Representative Hidekazu Naito speaks at ORA crisis management case presentation seminar.

• Year-end and New Year holiday notice published.

• Launches serial column for restaurant owners, "Aggressive Labor Management".

A labor and social insurance consultancy for service-industry businesses, positioning itself as a trusted partner that goes beyond labor administration into management strategy and organizational support.

• Social insurance procedures

  Enrollment procedures, health insurance and employees' pension administration, labor insurance applications, and premium calculation support.

• Payroll calculation

  Monthly payroll, year-end tax adjustment, withholding tax management, payslip preparation, and payroll system implementation support.

• Labor consultation

  Employment contract drafting, work rules consultation, labor trouble response, harassment prevention, and labor law revision compliance.

• Subsidy and grant application support

  Information provision, application document preparation, eligibility analysis, and post-receipt support.

• HybRid cloud labor management system

  A cloud-based labor management system developed by the CSS Group.

1. 1社会保険労務士法人CSS｜社会保険手続き・給与計算代行・労務相談ならお任せcss-sr.com
2. 2事務所について｜社会保険労務士法人CSS（大阪市淀川区）｜代表挨拶・経営理念・アクセス情報css-sr.com
3. 3Shakai Hoken Roumushi Houjin CSS - Wikidatawikidata.org