The relationship is an interdependent one, as a "senpai" requires a "kōhai" and vice versa, and establishes a bond determined by the date of entry into an organization. "Senpai" refers to the member of higher experience, hierarchy, level, or age in the organization who offers assistance, friendship, and counsel to a new or inexperienced member, known as the "kōhai", who must demonstrate gratitude, respect, and occasionally personal loyalty. The "kōhai" defers to the "senpai"s seniority and experience, and speaks to the "senpai" using honorific language. The "senpai" acts at the same time as a friend. This relation is similar to the interpersonal relation between tutor and tutored in Eastern culture, but differs in that the "senpai" and "kōhai" must work in the same organization.