和泉 大樹（Daiki Izumi）

[2026 Edition] A Comprehensive Guide to Social Insurance Eligibility Requirements for Part-Time and Casual Workers. This guide covers all the new standards applicable to companies with 51 or more employees—such as working 20 or more hours per week and earning 88,000 yen or more per month—as well as the rules governing employment insurance. It also clearly explains the benefits of enrollment, including comparisons with National Pension premiums (17,060 yen per month), sickness allowance, and future pension supplements.

Why do employees feel that their take-home pay hasn’t increased even after a pay raise? The reason lies in the rising burden of “social insurance premiums,” which account for approximately 15% of labor costs. This article provides a thorough explanation of how employer and employee contributions work. We’ll also detail the risks posed by statutory welfare costs that strain business operations, as well as strategic measures to maximize take-home pay.

Experts provide clear, easy-to-understand explanations of everything from eligibility requirements for unemployment insurance to the amount and duration of unemployment benefits (basic allowance). This guide also covers the latest information, including the differences between voluntary and involuntary termination, as well as the upcoming expansion of eligibility to include those working “10 or more hours per week” by 2028. Check out how to calculate the benefits you’re entitled to before you leave your job!