FY2025 ICRR Master and Doctor Workshop

Friday 20 Feb 2026, 09:00 → 18:15 Asia/Tokyo

Media Hall and Community Salon (Kashiwa Library)

[Zoom Information]
https://u-tokyo-ac-jp.zoom.us/j/89169990681?pwd=MGXNaZCl2L8wLvDDUa7GR2MbMN2iwj.1
Meeting ID: 891 6999 0681
Passcode: 020599

[Presentation Time]
Oral (Master's): 12 mins (9 mins for talk, 3 mins for questions)
Oral (Doctoral): 20 mins (17 mins for talk, 3 mins for questions)
Poster: 1 hour

09:00 → 09:10 Seating Time

09:10 → 09:15 Opening Remarks

Convener: Chisato Koyama

09:10 Welcome Address

Speaker: Shoichi Ogio

09:15 → 10:03 Oral Session: Master’s 1 (4 Presenters)

Convener: Yuji Yamanaka

09:15 (日本語) 「水チェレンコフ検出器におけるCNN機械学習の手法を用いた粒子識別の研究」 （Study on Particle Identification Using CNN Machine Learning Methods in Water Cherenkov Detector）

Speaker: Ryotaro Nishijima

09:27 (日本語) ハイパーカミオカンデの外水槽検出器

Speaker: Ryotaro Shinoda

09:39 (日本語) ベイジアンアンフォールディング法を用いたチベット空気シャワーアレイによる原子核種別宇宙線エネルギースペクトル決定手法の開発

Speaker: Ginga Imaizumi

09:51 (日本語) Development of a Counting Rate Correction Method for the Detection of Cosmic Ray Transient Events with the ALPAQUITA Air Shower Array

Speaker: Futatsu Sugimoto

10:03 → 10:10 Break

10:10 → 11:10 Oral Session: Master’s 2 (5 Presenters)

Convener: Kento Imai

10:10 (日本語) 銀河における軽元素と宇宙線スペクトルの再現（Reproduction of light elements and cosmic-ray spectra in our Galaxy）

Speaker: Yusaku Fukumoto

10:22 (日本語) 銀河風と降着流がつくる乱流領域における宇宙線スペクトル進化の数値研究（Numerical study on the evolution of cosmic-ray spectrum in the turbulent region formed by galactic winds and accretion flows）

Speaker: Ryohei Inamoto

10:34 (日本語) Cosmic Reionization History and Its Cosmological Implications Probed by Optical and Near-Infrared Spectroscopy

Speaker: Yuta Kageura

10:46 (日本語) 機械学習と効率的なパラメータ表現を用いた連星合体重力波のパラメータ推定手法の開発

Speaker: Kazuki Takada

10:58 (日本語) 正規直交化波形を用いたブラックホールリングダウン重力波の解析 （Analysis of Black Hole Ringdown with Orthonormal Modes）

Speaker: Motoki Suzuki

11:10 → 11:20 Break

11:20 → 12:08 Oral Session: Master’s 3 (4 Presenters)

Convener: Kai Morita

11:20 (日本語) 多段階対称性の自発的破れによる宇宙ひも （Cosmic Strings in Multi-Step Symmetry Breaking）

Speaker: Yaxuan Wen

11:32 (日本語) GUTスケールにおける重いフェルミオンの影響：大統一と陽子崩壊の統計的研究 （Fermion Multiplicities at the GUT Scale: A Statistical Study of Unification and Proton Decay）

Speaker: Ko Hirooka

11:44 (日本語) 暗黒物質探索実験 XENONnT における 測定感度向上のための検出器評価

Speaker: Kotaro Otsuzuki

11:56 (English) Vision Transformer for event reconstruction in Hyper-Kamiokande far detector

Speaker: Shuoyu Chen

12:08 → 12:10 Group Photo

12:10 → 13:30 Lunch Break

13:30 → 14:30 Poster Session: Master’s & Doctoral (17 Presenters)

13:30 (Poster) ALPAQUITA実験のエネルギー推定の最適化

Speaker: Yuji Yamanaka

13:30 (Poster) A Study of Cosmic-Ray Electrons in the Tens of TeV energy region with the Tibet Air Shower Experiment

Speaker: Naru Tamaki

13:30 (Poster) Accurate Estimation of the Spin Distribution of Binary Black Holes Using Gravitational-Wave Data

Speaker: Kazuya Kobayashi

13:30 (Poster) An Evaluation of Systematic Uncertainties Arising from the Observation Direction Approximation in CTAO LST-1 Data Analysis

Speaker: Toya Nagata

13:30 (Poster) Analysis of Gravitational Waves from Hypermassive Neutron Stars with the Future Sensitivity of KAGRA

Speaker: Yuto Ichinose

13:30 (Poster) Anlysis of Inclined Air Showers by the TA Surface Detector Array

Speaker: Chisato Koyama

13:30 (Poster) CTAO大口径望遠鏡向け光電子増倍管におけるアフターパルス減少の測定

Speaker: Kai Morita

13:30 (Poster) Determining the Optimal Reference Frequency for Estimating Time- Dependent Correction Factors (TDCFs)

Speaker: Shingo Hido

13:30 (Poster) Exploring Inelastic Dark Matter with the XENONnT Experiment

Speaker: Yoshino Kaminaga

13:30 (Poster) Optimizing Searches for Long-Duration Gravitational Waves from Low-Mass Binaries Coalescences

Speaker: Yasuhiro Murakami

13:30 (Poster) Relationship between Electric Field and Cosmic Ray Count Rate at the ALPACA Site

Speaker: Atsushi Mizuno

13:30 (Poster) Study for muon puzzle with TA SD

Speaker: Yuta Tange

13:30 (Poster) Two Faint Little Red Dots Separated by ~70 pc Hidden in a Single Galaxy at z~7

Speaker: Hiroto Yanagisawa

13:30 (Poster) VENUS: Strongly Lensed Clumpy Galaxy at z~11-12

Speaker: Minami Nakane

13:30 (Poster) XENONnT実験中性子Veto装置のための鉄イオン除去フィルターの開発

Speaker: Kyosuke Okamura

13:30 (Poster) スーパーカミオカンデにおける陽子崩壊p→ν￣K+探索の機械学習を用いた検出効率改善手法の開発

Speaker: Takuya Tomiya

13:30 (Poster) ニュートリノ CP 対称性破れの発見に向けたエネルギー再構成精度向上のための水透過率位置依存性測定手法の開発

Speaker: Tzu-Han Hung

14:30 → 14:40 Break

14:40 → 16:00 Oral Session: Doctoral 1 (4 Presenters)

Convener: Yoshino Kaminaga

14:40 (English) Statistical Study on Cosmic Reionization with Subaru/HSC Imaging and JWST/NIRSpec Spectroscopic Data （すばるHSC撮像及びJWST/NIRSpec分光データの統計に基づく宇宙再電離の研究）

Speaker: Hiroya Umeda

15:00 (English) Numerical and Analytical Studies of Dynamical Effects of Relativistic Jets on Gamma-Ray Burst Afterglows (相対論的ジェットの運動がガンマ線バースト残光放射に及ぼす影響の数値的及び解析的研究)

Speaker: Yo Kusafuka

15:20 (English) Full-Sky Study of Galactic Cosmic-Ray Anisotropy with the Tibet ASγ and ALPAQUITA Air-Shower Arrays

Speaker: Teruyoshi Kawashima

15:40 (English) Exploring the Origin of Ultra-High-Energy Cosmic Rays through EeV Neutrino Search with the Telescope Array Surface Detectors

Speaker: Kaoru Takahashi

16:00 → 16:10 Break

16:10 → 17:10 Oral Session: Doctoral 2 (3 Presenters)

Convener: Chenghao Zhu

16:10 (English) Local Control Noise Reduction with Modal Control for Vibration Isolation System in Gravitational Wave Detector (重力波検出器におけるモード制御による防振懸架システムの制御雑音の低減)

Speaker: Masahide Tamaki

16:30 (English) Search for Gravitational Waves from Coalescing Compact Binaries in KAGRA Data Using an Optimized External Trigger Method （KAGRAデータにおけるコンパクト連星合体重力波の最適化された外部トリガー法による探索）

Speaker: Takashi Kato

16:50 (English) Sterile neutrino dark matter production in a lepton asymmetric universe: theory and observational implications （レプトン非対称宇宙におけるステライルニュートリノ暗黒物質の生成機構と観測的帰結）

Speaker: Kentaro Kasai

17:10 → 17:30 Poster Voting / Awards Deliberation

17:30 → 18:00 Awards Ceremony

Convener: Chisato Koyama