<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body style="overflow-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;"><b>CALL FOR PAPERS</b><div><br></div><div><br><b>Fifth International Workshop on Blockchain: Blockchain Kaigi 2025<br></b><br>December 04-06, 2025<br>IIT Bombay, India.<br><br><a href="https://bck-2025.isrdc.in/">https://bck-2025.isrdc.in</a><br>Submission deadline: September 15<br><br><br>The International Workshop "Blockchain Kaigi" (Kaigi: Meeting, Conference) aims at bringing together researchers and practitioners from various communities of science and technology working on areas related to FinTech, crypto-asset, and blockchain. Authors are encouraged to submit theoretical and/or applied articles on their research related to Blockchains in general. We have excellent <b>Keynotes </b>lined up during this workshop (partial list).<br><br>1) Dilip Asbe, MD & CEO, National Payments Corporation of India<br>2) Suvendu Pati, Chief General Manager, FinTech, Reserve Bank of India<br>3) Kazumasa Omote, Professor, University of Tsukuba, Japan<br>4) Hidenori Nakazato, Professor, Waseda University, Japan<br><br><b><font color="#5e30eb">Authors are invited to submit 2-page extended abstract describing original, previously unpublished work, not currently under review by another conference, workshop, or journal.</font></b> Please submit your extended abstract using EasyChair: https://easychair.org/conferences?conf=bck25<br><br>The abstract should include the title of the presentation, the names and affiliations of the speaker and co-researcher(s), a description of the content of the presentation, and one figure or table to supplement the description. The abstract should be two pages at maximum. Only PDF files will be accepted for the review process.<br><br><b>Deadline of abstract submission for general speakers: Sep. 15, 2025.</b><br><br>Indicative Topics of Interest (not an exhaustive list):<br><br>- Consensus, Fault-tolerance, Scalability<br>- Cryptography & Mathematics<br>- Applications in Cybersecurity<br>- Digital Asset Market, AUM<br>- Central Bank Digital Currency (CBDC)<br>- Innovation Policy, SDGs<br>- Modelling of on-chain activity<br>- Digital Identity & Privacy<br>- Token Ecosystem, Finternet<br>- IoU networks, Settlements<br>- Lightning networks, Interoperability<br>- Smart Contract Verification, DAOs<br>- Smart-Grid, Smart-City<br>- FinTech, AgTech, HealthTech<br>- Legal and Regulatory Issues<br>- Network Science, Hypergraphs<br>- Innovative Use Cases for public good<br>- Ledger analytics for privacy and AML<br>- ML Applications to Blockchain<br>- Blockchain for AI/ML ecosystem<br>- Simulation tools<br>- Visualisation of transaction trails<br><br>Other topics in distributed ledger technologies will also be considered in the spirit of the above. Authors are invited to enter submissions describing original, previously unpublished work, not currently under review by another conference, workshop, or journal.<br><br><br><b>PROCEEDINGS PUBLICATION</b><br><br><font color="#5e30eb">Extended versions of accepted contributions will be invited for publication in JPS conference proceedings and a special issue of the Ledger Journal after your presentation at BCK25.</font><br><br>For accepted manuscripts, at least one author must attend and present the paper. BCK25 is an in-person event.<br><br><br><b>SUBMISSION GUIDELINES</b><br><br>For compiling your submission (<b>2-page extended abstract</b>), please use this [1] LaTeX template or this [2] MS Word template. The abstract should include the title of the presentation, the names and affiliations of the speaker and co-researcher(s), a description of the content of the presentation, and one figure or table to supplement the description. The abstract should be two pages at maximum. Only PDF files will be accepted for the review process.<br><br>[1] https://bit.ly/40L8Bfb<br>[2] https://bit.ly/4l0PCEz<br><br><br>ABOUT BCK WORKSHOPS<br>-------------------<br><br>On February 17th - 18th, 2021, the international workshop \u201cBlockchain in Kyoto 2021 (BCK21)" was hosted at Kyoto University, Japan. This event drew participants from around the globe, fostering a vibrant exchange of knowledge and ideas within the blockchain community. Continuing this tradition, the next instalment, \u201cBCK22: Blockchain Kaigi 2022," took place on August 4th - 5th, 2022, at Tohoku University, Japan. It maintained the legacy of its predecessor by uniting a diverse group of forward-thinking researchers and practitioners who shared their latest findings and innovative<br>solutions in blockchain technology. The "BCK23: Blockchain Kaigi 2023\u201d session was held on October 28th -29th, 2023 at RIKEN's Kobe Campus<br>(Kobe City), Japan. The recent edition of this kaigi was held at University of Zurich between September 12 and 13 as "BCK24: Blockchain Kaigi 2024".<br><br>Building on this rich tradition of Blockchain Kaigi, we invite you to join us at IIT Bombay, where this year's Blockchain Kaigi (BCK25) will be held between December 4 and 6. BCK25 will continue to serve as a venue where experts from scientific and technological disciplines can<br>discuss, collaborate, and advance the field of blockchain research. Authors are invited to submit both theoretical and applied papers that contribute to the broad spectrum of blockchain studies.<br><br><br>PREVIOUS EDITIONS<br>-----------------<br><br>- BCK21 - Kyoto University<br>- BCK22 - Tohoku University<br>- BCK23 - RIKEN Kobe Campus<br>- BCK24 - University of Zurich<br><br><br>IMPORTANT DATES<br>---------------<br><br>* Submission deadline: September 15<br>* Notification of accptance: October 15<br>* Camera-ready submission: October 25<br>(All dates will follow AoE time 23:59)<br></div><br class="Apple-interchange-newline"></body></html>