This paper presents our ongoing research in identifying use cases, developing plans, and evaluating the effectiveness of measures taken to ensure our network meets the needs of Fukuoka University use cases, focusing on our work to transition to IPv6 next-generation networks and enhancements to network security. Against the backdrop of the rapidly evolving era of ultra-high- capacity communications, the number of devices connected to cam- pus networks is rapidly increasing in terms of the number of Wi-Fi device connections at Fukuoka University. As a result, the prob- lem of IPv4 address space exhaustion, here is an urgent need to review IPv4 operations and migrate IPv6, the next-generation In- ternet protocol. This smooth transition from IPv4 to IPv6 will be discussed in detail based on our case study in Part 1[1] and our plans for the future. In addition, university network security has become increasingly important in recent years as cyber attacks have become more sophisticated and diversified. Therefore, from the viewpoint of network security, we will analyze more deeply how the introduction of Web Content Filter Service and ProtectiveDNS contributes to improving security, following Part 1[1], and clarify its effective- ness and challenges. This presentation of our research will provide attendees with information and examples of real-world applications of cutting-edge technology, and IPv6 deployment and network security technologies, along with clear guidelines for what to consider when implementing similar strategies in complex networking environments.