In Filling Regulatory Gaps in High Seas Fisheries, author Yoshinobu Takei investigates the regime of high seas fisheries from the perspective of international law and considers whether there are regulatory gaps in high seas fisheries and, if so, how they should be filled. The book focuses on topical issues such as the management of deep-sea fisheries on the high seas and the protection of vulnerable marine ecosystems. In view of the current state of marine fisheries resources, together with ecosystem concerns, swift and effective action is required to improve fisheries management, in particular for high seas fisheries. Takei thoroughly analyzes the current state of affairs and convincingly suggests steps to be taken in the future.