Hackazouk Co., Ltd.

Hackazouk is an HR tech company on a mission to redesign how organizations and their alumni (former employees) stay connected. Originally operating as Lein Inc., the company rebranded to focus exclusively on the fast-emerging alumni domain and launched its flagship platform, Official-Alumni.com.

While corporate alumni networks are already a standard practice in Western markets, the concept is still in its early stage in Japan—creating a unique opportunity to shape an entirely new category. As talent mobility increases, alumni relationships are becoming a strategic asset for hiring, referrals, business development, and brand engagement.

Hackazouk operates at the intersection of HR and technology, combining SaaS product development with media and consulting. Despite still being a relatively small team, client adoption continues to grow, offering significant ownership and career impact for those who want to build the market from the ground up. This environment is particularly appealing to individuals who thrive in growth-phase companies, want to influence product and strategy, and are excited to contribute to a mission-driven business in a developing field.