The plaintiff exercised her right under Japanese law to reduce her working hours to spend time taking care of her child. The internal policy of her employer stated that employees who did not attend work for 90% or more of work days are ineligible for a bonus. The plaintiff’s employer counted the plaintiff’s shortened working days as absences and refused to pay her a bonus. The plaintiff sued her company for a bonus. The Supreme Court determined that the employer’s internal policy violated public policy and the employer should have counted actual working hours when calculating attendance rate.