The appellee, a former employee of the appellant’s subsidiary, suffered sexual harassment and stalking from an employee of the appellant’s other subsidiary who shared the same work site with the appellee. The appellant had developed a corporate-group-wide compliance system, which included a consulting desk at which an employee of the appellant or its subsidiaries could raise and discuss any compliance-related matters. The appellee brought the harassment issue to her supervisors at her immediate employer (i.e. the appellant’s subsidiary) twice, but sufficient solutions were not provided, following which she left the company without bringing the issues to the consulting desk. The stalking continued even after her resignation, so her former colleague who still worked at the appellant's subsidiary brought the issue before the appellant through the consulting desk, but it did not provide sufficient solutions either. The question brought before the Supreme Court was whether the appellant (i.e. a parent company of her former immediate employer) bore the duties based on the principle of good faith to provide certain protective measures to the appellant because it had developed the corporate-group-wide compliance system. The Supreme Court found that the appellant was not imposed with such duties in light of particular facts in the case since the appellant did not bring the harassment issue to the consulting desk during her employment. However, in dicta, the Court stated that a parent company, depending on particular facts of the case, can be responsible for providing sufficient solutions to an employee of its subsidiary who is a victim of sexual harassment––failure of which would result in liability for damage based on the principle of good faith––if the parent company provides a system through which the employee could, and actually did, bring an issue of sexual harassment to the parent company’s attention.
上告人の子会社の元契約社員である被上告人は、同じ事業場内で就労していた他の子会社の従業員からセクシャル・ハラスメントやストーカー行為を受けていた。被上告人は、直属の勤務先（上告人の子会社）の上司にこの問題に関して二度相談したが、問題が十分に解決されなかったため、上告人が設置していたグループ会社内全体の社員が事業場内に関する事項を相談できるコンプライアンス相談窓口に相談することなく退職した。その後も被上告人に対するストーカー行為が継続していたため、上告人の子会社に勤務していた被上告人の元同僚は、被上告人のため、上告人の設置したコンプライアンス相談窓口に相談した。しかし、それでも問題は解決されなかった。最高裁では、コンプライアンス相談窓口を設置していたことを理由に、上告人が信義則に基づき一定の付随義務を負うか否かが問題となった。被上告人が在職中にハラスメント問題を相談窓口に申し出なかったことと、本件の特殊な事実関係に照らして、最高裁は上告人が雇用契約上の付随義務を負わないことを確認した。一方で、本件判決は、子会社の従業員がセクシャルハラスメントに遭った際、問題を親会社の相談窓口への申出ることができ、その申出の具体的状況によって、親会社が申出をした者に対し、申出に係る相談の内容等に応じて適切に対応すべき信義則上の義務を負う場合があると判示した。