The highly anticipated 7th Blockchain and IoT Conference (BIOTC 2025) is set to take place from June 25 to 27, 2025, in the innovative city of Tsukuba, Japan. This premier event serves as a vital gathering for researchers, industry experts, and academia to explore groundbreaking advancements in decentralized finance (DeFi) and the Internet of Things. Participants will have the opportunity to engage in vibrant discussions, share insightful research, and foster partnerships that can propel innovation in these transformative sectors. The conference will feature an array of keynote speeches, specialized sessions, and avenues for presenting research papers, which will be published in indexed proceedings within the cryptocurrency ecosystem.