Geodesics: Orbits and Rays 2025
Geodesics: Orbits and Rays 2025
December 4 - December 5, 2025
Ikebukuro Campus, Rikkyo University
The talk is scheduled for 30 minutes: 25 minutes for the presentation and 5 minutes for Q&A.
We kindly ask that your talks be prepared in English.
This is a map of cafeterias at Rikkyo University, including convenience stores and vending machines.
All cafeterias start getting crowded around 11:50, so please hurry if you plan to visit during the workshop’s lunch break.
Please see also the map of restaurants outside Rikkyo University (created by student).
Feel free to use this as well.
We plan to hold a banquet from 7:00 PM to 9:00 PM on the first day.
The venue is "Toro-Masa" at Ikebuluro.
For participants who indicated during registration that they would attend thebanquet, please prepare the following participation fee:
Students: 3,000 JPY
Non-students: 5,000 JPY
If you wish to cancel your participation in the banquet, please contact us by Thursday, November 27.
Date: December 4 (Thu) - December 5 (Fri), 2025
Venue: Room 4340, Building No. 4, Ikebukuro Campus, Rikkyo University
Room 4340, Building No. 4, Ikebukuro Campus, Rikkyo University
This workshop aims to provide a forum for free discussion on a wide range of theoretical and observational topics, using geodesics as a keyword. This includes theoretical issues in relativistic orbit calculations and observational tests of black holes
Presentations are not limited to completed results; research in progress, preliminary ideas, and topics intended to stimulate discussion are also welcome. Through open and interactive discussions among participants, we hope to foster the exchange of perspectives, the emergence of new research directions, and potential collaborations.
This workshop consists solely of invited talks. Therefore, we invite others to attend as listeners only, but we sincerely hope you will join us. We sincerely look forward to your participation.
Hideki Asada (Hirosaki University)
Takeshi Chiba (Nihon University)
Ryuichi Fujita (Otemon Gakuin University)
Tomohiro Harada (Rikkyo University)
Kenta Hioki (Sumitomo Mitsui Banking Corporation)
Takahisa Igata (Gakushuin University)
Akihito Katsumata (Rikkyo University)
Tomohisa Kawashima (National Institute of Technology, Ichinoseki College)
Masashi Kimura (Daiichi Institute of Technology)
Yasutaka Koga (Osaka Institute of Technology)
Kei-ichiro Kubota (Institute for Cosmic Ray Research, The University of Tokyo)
Ryuya Kudo (National Institute of Technology, Ube College)
Kenta Matsuo (Osaka Metropolitan University)
Ken'ichi Nakao (Osaka Metropolitan University)
Keisuke Nakashi (Rikkyo University)
Kota Ogasawara (Meiji University)
Palomino Ylla Ariadna Uxue (Nagoya University)
Norichika Sago (Kanazawa Medical University)
Hiromi Saida (Daido University)
Tadashi Sasaki (Kumamoto Gakuen University)
Tomoki Takeuchi (Rikkyo University)
Naoki Tsukamoto (Tokyo University of Science)
Chulmoon Yoo (Nagoya University)
Please register using the form below.
Deadlines: Friday, November 21, 2025, 23:59
Registration has closed.
Tomohiro Harada (Rikkyo U.)
Hiromi Saida (Daido U.)
Takahisa Igata (Gakushuin U.)
Akihito Katsumata (Rikkyo U.)
Masaki Sekine (Rikkyo U.)
This workshop is supported by the following JSPS KAKENHI Grants:
"Numerical relativity studies on primordial black hole formation in different mechanisms"
(Grant-in-Aid for Scientific Research (C), No. 24K07027, Principal Investigator: Tomohiro Harada)
"Typical observable of Black Holes and enhancing the possibility of its detection near future"
(Grant-in-Aid for Scientific Research (C), No. 25K07328, Principal Investigator: Hiromi Saida)
"Establishing a theoretical framework for identifying black holes"
(Grant-in-Aid for Scientific Research (C), No. 22K03611, Principal Investigator: Takahisa Igata)
Akihito Katsumata (Rikkyo U.)
a.katsumata_AT_rikkyo.ac.jp（Please replace "_AT_" with "@"）