Saisei Ventures is a venture capital firm dedicated to fostering next-generation companies through transformative science in the medicine industry. The firm focuses on leveraging Japanese innovations in biotech and connecting them with global expertise. Saisei Ventures typically invests in seed and Series A rounds, supporting ventures that emerge from bold ideas within the Japanese biotech ecosystem.
Notable portfolio companies include Ryne Biotechnology, which has raised $3 million, and Tune Therapeutics, which has raised $40 million. Saisei Ventures is led by key partners with deep expertise in both Japanese and global markets, aiming to bridge the divide between pioneering research in Japan and the international market. The firm offers unique value-add services by accelerating returns through strategic connections and leveraging engineered biology to create impactful ventures.
Saisei Ventures - Portfolio Snapshot
Portfolio activity breakdown across disclosed investments and stages
Portfolio Companies2
Current Portfolio Count2
Top Investment Stages
Seed1 (50.0%)
Series A1 (50.0%)
Stage Mix
Seed 50%Series A 50%
Concentration shown as share of disclosed investments by stage.
