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East Asian ALMA Science Workshop 2025 &
East Asian ALMA Data Analysis Workshop 2025
22-26 September, 2025

We are pleased to announce the East Asian (EA) ALMA Science Workshop 2025. The EA ALMA community of Taiwan, Korea, and Japan has gotten together every year to share new results and to promote collaborations among the researchers in the EA region. The workshop will be hosted at the Inamori Hall, Korimoto Campus of the Kagoshima University on September 22-24, 2025, which is near the Kagoshima Chuo Station in Kagoshima City. All researchers interested in ALMA are welcome to join. Following the successful EA ALMA Data Analysis Workshop held last year in Korea, we will also have the second EA ALMA Data Analysis Workshop on September 25-26, to facilitate collaboration and skill development among young astronomers. Through group work guided by experienced supervisors, we promote close interactions among the EA members.
With the Wideband Sensitivity Upgrade project making progress, we will have a discussion on synergies between ALMA and other facilities. Researchers working on synergetic studies with new facilities (e.g., JWST, …) and leading facilities that will be in operation in the near future (e.g., SKA, Vera C. Rubin Observatory) in the EA community are invited to discuss their works. We also hope to see many scientific results based on ALMA from the EA community. This will provide an opportunity to initiate collaborations aiming at EA-led ALMA Large Projects, while looking for avenues to further promote the presence of EA to the world.

Date
– in-person only –
East Asian ALMA Science Workshop 2025 : 22-24 September, 2025
East Asian ALMA Data Analysis Workshop 2025 : 25-26 September, 2025

Venue　
– please note that this workshop will be held onsite only. –
East Asian ALMA Science Workshop 2025 : Inamori Kaikan, Kagoshima University
  Conference Dinner : Vege Marche'19 at Inamori Memorial Hall, Kagoshima University
East Asian ALMA Data Analysis Workshop 2025 : Graduate School of Science and Engineering, Kagoshima University

Access to Kagoshima University

Important date

  • March 14:                  1st announcement
  • May 2:                       Registration open for Data Analysis Workshop
  • May 16:                     Registration open for Science Workshop
  • June 2:                       Data Analysis Workshop registration deadline
  • ~ June 9:                    Announcement of the list of Data Analysis Workshop participants
  • June 16:                     Talk abstract submission deadline
  • August 22:                 Poster abstract submission deadline & registration close
  • September 22-24:      EA ALMA Science Workshop
  • September 25-26:      EA ALMA Data Analysis Workshop


Invited Speakers
  • Hiddo Algera (ASIAA)
  • Yusuke Aso (KASI)
  • Junhyun Baek (KASI)
  • Christian Alejandro Florez Gonzalez (ASIAA)
  • Shun Ishii (NAOJ)
  • Taiki Kawamuro (Osaka University)
  • Hauyu Baobab Liu (National Sun Yat-sen University)
  • Jongho Park (Kyung Hee University)
  • Sophia Stuber (MPIA)
  • Yuma Sugahara (Waseda University)
  • Ya-Wen Tang (ASIAA)
  • Yosuke Utsumi (NAOJ Chile)
  • Yao-Lun Yang (RIKEN)
  • Tomohiro Yoshida (SOKENDAI/NAOJ)



SOC/LOC members

  • East Asian ALMA Science Workshop 2025

  • SOC:
  • Aeree Chung (Yonsei University)
  • Jongsoo Kim (KASI)
  • Lihwai Lin (ASIAA)
  • Takuya Hashimoto (University of Tsukuba, Chair)
  • Bunyo Hatsukade (NAOJ)
  • Sascha Trippe (Seoul National University)
  • Hsi-Wei Yen (ASIAA)
  • LOC:
  • Shigehisa Takakuwa (Kagoshima University)
  • Bunyo Hatsukade (NAOJ)
  • Akiko Kawamura (NAOJ)
  • Kazuya Saigo (Kagoshima University)
  • Jinshi Sai (Kagoshima University)
  • Yuhito Shibaike (Kagoshima University)
  • Miyu Kido (Kagoshima University)
  • Hiroshi Imai (Kagoshima University)

  • East Asian ALMA Data Analysis Workshop 2025

  • SOC:
  • Natsuko Izumi (NAOJ, Chair)
  • Akiko Kawamura (NAOJ)
  • Seokho Lee (KASI)
  • Sheng-Jun Lin (ASIAA)
  • Aran Lyo (KASI)
  • Hsi-Wei Yen (ASIAA)
  • 　　
  • LOC:
  • Shigehisa Takakuwa (Kagoshima University)
  • Natsuko Izumi (NAOJ)
  • Kazuya Saigo (Kagoshima University)
  • Shu Ishibashi (Kagoshima University)



Hosts:
Amanogawa Galaxy Astronomy Research Center AGARC, Graduate School of Science and Engineering, Kagoshima University
ALMA Project, National Astronomical Observatory of Japan
AGARC ALMA NAOJ


Scientific Program
  Last update on 22nd of July
　– All times shown below are in Japan Standard Time (UTC +9).
　– Title and abstract for each presentation will be coming soon.
Day 1 (22nd of September) 　
Opening and Facilities 　
09:00 - 09:05 Opening
09:05 - 09:30 (Invited) Shun Ishii (Invited) EA ALMA project
09:30 - 09:55 (Invited) Yosuke Utsumi (Invited) LSST Science
09:55 - 10:15 Geoffrey Bower The James Clerk Maxwell Telescope:  Status and Future Plans
10:15 - 10:25 Poster Flash Talks Poster Flash Talks  
10:25 - 10:50 Break
High-z galaxies and AGNs 　
10:50 - 11:15 (Invited) Yuma Sugahara (Invited) Ionization Environment in the Era of Reionization Seen through the Eyes of ALMA and JWST
11:15 - 11:40 (Invited) Hiddo Algera (Invited) Characterizing dust formation and the ISM conditions of high-redshift galaxies with ALMA and JWST
11:40 - 11:55 Suzuka Arai Optimizing Lyman Break Color Selection for Distant Galaxies: Insights from z~9-14 Galaxies
11:55 - 12:10 Kanako Narita ALMA Lensing Cluster Survey: Molecular Gas Properties of Line-Emitting Galaxies from a Blind survey and Discovery of CH Emission at z∼ 1
12:10 - 12:20 Poster Flash Talks Poster Flash Talks
12:20 - 14:05 Lunch
Astrochemistry 　
14:05 - 14:30 (Invited) Yao-Lun Yang (Invited) Evolution of Complex Organic Molecules from Ice to Gas
14:30 - 14:45 Yoko Oya Sulfur-bearing Species in the Outflow and Disk-Forming Region of B335
14:45 - 15:00 Yo-Ling Chuang Tracing the Ice Front: ALMA Band-1 Views of CH₃OH, HNCO, NH₃, and H₂CO in Orion-KL
15:00 - 15:15 Satoko Takahashi Physical and Chemical Variations Observed toward Two Extremely Young Protostellar Sources in Orion
15:15 - 15:30 Shaoshan Zeng Methanol deuteration in the disk around V883 Orionis with laboratory measured spectroscopy
15:30 - 15:40 Poster Flash Talks Poster Flash Talks
15:40 - 16:05 Break
Stellar Evolution & ISM 　
16:05 - 16:30 (Invited) Christian Flores (Invited) Unveiling Protostellar Evolution Through Infrared and (sub)Millimeter Observations
16:30 - 16:45 Manojit Chakraborty Study of Correlation between Accretion and Outflow Processes in Young Stellar Objects
16:45 - 17:00 Hiroshi Imai Circumstellar masers associated with "water fountain" stars and explored with ALMA
17:00 - 17:15 Natsuko Izumi CI/CO abundance ratio of shock-excited gas in the Magellanic supernova remnant N63A
17:15 - 17:30 Rei Enokiya Towards a Comprehensive View of Multi-phase Interstellar Gas: Insights from ALMA and SKA Precursors
17:30 - 17:45 Pei-Ying Hsieh ALMA Central Molecular Zone Exploration Survey (ACES): CS, SO, H40a, and HC3N lines data release
Day 2  (23rd of September) 　
Protoplanetary Disk 　
09:00 - 9:25 (Invited) Hauyu Baobab Liu (Invited) Dust growth and planet-formation (and observational point of view)
09:25 - 9:40 Youngwoo Choi Early Planet Formation in Embedded Disks (eDisk): Dust Masses and Grain Sizes of Embedded Disks
09:40 - 9:55 Masayuki Yamaguchi ALMA 2D Super-resolution Imaging Survey of Lupus Protoplanetary Disks: Early Results from Two Pilot Studies of Peculiar Substructures
09:55 - 10:10 Ilseung Han Early Grain Growth in the Class I Protobinary System L1551 IRS 5
10:10 - 10:25 Miyu Kido 3D orbital characterization and disk properties in Class II binary
10:25 - 10:50 Break
Star Formation & Outflow 　
10:50 - 11:15 (Invited) Yusuke Aso (Invited) Advances in eDisk and Multi-Method Stellar Mass Estimation
11:15 - 11:30 Nagayoshi Ohashi The Envelope–Protostellar Mass Relationship: Surprisingly High Star Formation Efficiency?
11:30 - 11:45 Jesus Alejandro Lopez-Vazquez Infalling and Rotating Envelope Around the Protostellar System HH 212
11:45 - 12:00 Asako Sato Diverging Dust Properties in a Shared Filament: Polarization Differences in the B213 Young Twin Protostars
12:00 - 12:15 Junyoung Moon Bipolar Outflow Momentum Depending on Misalignment of Outflow Axes and Magnetic Field Orientations
12:15 - 12:30 Vinod Chandra Pathak Molecular Winds and Fine-Structure Jets from an Edge-on Protoplanetary Disk HV Tau C: New Perspectives from JWST
12:30 - 14:15 Lunch
High-z AGNs and Submillimeter Galaxies  　
14:15 - 14:40 (Invited) Taiki Kawamuro (Invited) Probing the Structure and Influence of AGNs through Synergistic X-ray and Millimeter Observations
14:40 - 15:05 Cheng-Yu Kuo Searching for H2O megamaser disks in the early Universe
15:05 - 15:20 Ryota Ikeda Formation Of Sub-Structure In Luminous Submillimeter galaxies (FOSSILS): Evidence of Multiple Pathways to Trigger Starbursts in Luminous Submillimeter Galaxies
15:20 - 15:35 Shutaro Ueda Exploring a distant, X-ray luminous galaxy cluster underlying an X-ray luminous quasar with ALMA
15:35 - 15:50 Zhengyi Chen Revealing GMCs in a superbright lensed Dusty Starburst at Cosmic Noon
15:50 - 16:05 Ryota Kojima ALMA Observations of Cold Molecular Gas in NGC 1275 within the central 10 pc
16:05 - 16:30 Break
High-Z, AGN, Galaxies 　
16:30 - 16:55 Sophia Stuber (Invited) An unparalleled view of (dense) molecular gas in nearby main-sequence galaxies
16:55 - 17:10 Nanase Harada Dense gas tracer N2H+ in the barred-spiral galaxy M83
17:10 - 17:25 Ryo Kishikawa
Components of star formation in NGC 253: Non-negative matrix factorization analysis with the ALCHEMI integrated intensity images
17:25 - 17:55 Discussion ALMA and other facilities (chair: JWST Hiddo, SKA Junhyun, ngVLA Munetake Momose, ALMA Nanase Harada)
Day 3  (24th of September) 　
Nearby galaxies and AGNs  　
09:00 - 9:25 (Invited) Junhyun Baek (Invited) The cold gas properties of AGNs and the scientific synergy between ALMA and the upcoming SKA
09:25 - 9:50 (Invited) Jongho Park (Invited) Imaging the Supermassive Black Hole at the Heart of M87 Using Global Millimeter Very Long Baseline Interferometry
09:50 - 10:05 Yuzuki Nagashima Signatures of the 13CO/C18O abundance ratio variation between bar and spiral arms in NGC 1068
10:05 - 10:20 Kibeop Lee Investigating the Morphology and Kinematics of the Interstellar Medium in Cool Gas-Rich Spirals
10:20 - 10:35 Fumiya Maeda Spatially and Dynamically Extended Molecular Gas in Stephan’s Quintet Revealed by ALMA CO(1–0) Total Power Mapping
10:35 - 11:00 Break
Protoplanetary Disk & Planetary Science 　
11:00 - 11:25 (Invited) Tomohiro Yoshida (Invited) Revealing Gas Surface Density Profiles in Protoplanetary Disks via Pressure-Broadened CO Line Wings
11:25 - 11:40 Jinshi Sai Direct Measurement of Turbulence in the Embedded Disk Around HL Tau
11:40 - 11:55 Munetake Momose Discovery of Jet-Bubble-Disk Interaction: Jet Feedback on a Protoplanetary Disk via an Expanding Bubble in WSB 52
11:55 - 12:10 Yuhito Shibaike Constraining Planetary Gas Accretion via Dust Continuum Emission from Circumplanetary Disks
12:10 - 12:25 Hsien-Ju Tsai ALMA Observations of the Chemical Composition of Ceres’ Exosphere
12:25 - 14:25 Lunch
Magnetic Field in Star Formation 　
14:25 - 14:50 (Invited) Ya-Wen Tang (Invited)
14:50 - 15:05 Jia-Wei Wang Multi-Scale Magnetic Fields from Filament to Envelope Scale in a Hub-Filament System G33.92+0.11
15:05 - 15:20 Jo-Shui Kao Testing the Polarization-Intensity Gradient Method for Magnetic Field Strength Estimation in Dense Core Simulations
15:20 - 15:35 Hanju Nam Constraining 3D structures of streamers through radiative transfer modeling of polarized dust emission
15:35 - 15:50 Shang-Jing Lin Linking Magnetic Flux Transport to Protostellar Disk Sizes
15:50 - 16:15 Break
High Mass Star Formation 　
16:15 - 16:30 Ke Huang Discovery of a chain of hot cores formed in a fast collapsing collision-compressed layer
16:30 - 16:45 Fernando Olguin Rotation and infall in high-mass YSOs
16:45 - 17:00 Vivien Chen Forming OB protostars in a highly structured rotating toroid with spirals
　 17:00 - 17:40 　 Discussion Collaboration among the EA regions (Bunyo; TH); the status of the EA SAC (Sagawa-san 10 minutes; LP balance; TH will send an mail to Sagwa-san)
　 17:40 - 17:45 　 Closing remarks Remark on the next meeting in Taiwan 

Workshop Topics and Groups

  1. Multi-bands
    (Mentor; Dr. Kotomi Taniguchi, NAOJ, Tutor; Dr. Jinshi Sai, Kagoshima Univ. )
    This topic will aim to obtain physical quantities (temperature, column density, dust grain size, etc.) from continuum and/or line data in multiple ALMA bands after beam matching.
    Members: Yang Erh Ching, Kibeop Lee, Lihwai Lin, Kushagra Srivastav, Hung Yu
  2. Polarization
    (Mentor; Dr. Hiroshi Nagai, NAOJ, Tutor; Dr. Natsuko Izumi, NAOJ)
    This topic will aim to derive spatial distributions of the polarization-intensity, -fraction, and -angle from observed Stokes I, Q, U (and V) images and visualize those quantities.
    Members:Shivani Gupta, Takeshi Hoshino, Jyun-Heng Lin, Jongho Park, Saurav Sen, Yu-Syuan Tu
  3. Self-calibration
    (Mentor; Dr. Yu-Nung Su, ASIAA, Tutor; Ms. Miyu Kido, Kagoshima Univ.)
    This topic will aim to apply the phase only and phase + amplitude self-calibration and investigate effects of various parameters, such as the solution time interval and clean threshold.
    Members: Chikato Asaba, Kazuto Haraguchi, Soochan Kim, Hinako Okimura, Hsien-Ju Tsai
  4. Sparse modeling
    (Mentor; Dr. Masayuki Yamaguchi, Kyushu Univ., Tutor; Mr. Ayumu Shoshi, Kyushu Univ.)
    This topic will aim to learn the idea of sparse modeling, apply the method to observed image(s) tuning parameters, and compare the output images with cleaned images.
    Members: Suzuka Arai, Hiroma Okubo, Yi Ren, Pialy Saha
  5. Total power combining + mosaic
    (Mentor; Dr. Pei-Ying Hsieh, NAOJ, Tutor; Dr. Sheng-Jun Lin, ASIAA)
    This topic will aim to learn the method for combining interferometric data and total-power (single dish) data together with the method for making images from mosaic ALMA observations.
    6. Members: Manojit Chakraborty, Yo-Ling Chuang, Jihye Hwang, Satyajeet Moharana, Yurika Nakamura
  6. Visibility fitting
    (Mentor; Dr. Zhengyi Chen, NAOJ, Tutor; Dr. Hsi-Wei Yen, ASIAA)
    This topic will aim to learn the process of fitting models directly to the visibility data obtained from interferometers. This method is used to determine source positions, flux densities, and structural parameters of astronomical objects.
    Members: Minori Esaki, Donghyeok Koh, Keisuke Nakashima, Wei-Ling Tseng, Ishizuka Yushi
  7. Basic course
    (Mentor; Dr. Seokho Lee, KASI, Tutor; Dr. Aran Lyo, KASI)
    This topic will target beginners, unlike the other topics. This topic will aim to learn basic ideas of imaging process (and calibration process if possible) of ALMA and make continuum and/or line images.
    Members: Ming-Tang Chen, Wei-Li Ling, Anzu Okazaki, Vinod Chandra Pathak, Majidul Rahaman, Shuntaro Sato


    –Please note that some of the topics, Polarization, needs some basic knowledge of interferometer data reduction, like clean etc.

Workshop Program
  Tentative program: (updated on 22nd of July )
　– All times shown below are in Japan Standard Time (UTC +9).
Day 1 (25th of September, Thurday)
08:00 - 09:00 Sign Up
09:00 - 09:05 Opening remark: gather in one room
09:05 - 11:30 Group Work
12:00 - 13:00 Lunch
13:30 - 18:00 Group Work (+ Break)
Day 2 (26th of September, Friday)
09:00 - 12:00 Group Work (including presentation preparation)
12:00 - 13:00 Lunch
13:00 - 14:30 Group Work (including presentation preparation)
14:30 - 17:30 Presentation
17:30 Close

Registration for EA ALMA Science Workshop

  • Registration Form   – now open –
  • Deadlines:
  •   Talk abstract submission deadline: 16th of June
  •   Poster abstract submission deadline: 22nd of August
  •   Registration close: 22nd of August

  • We would like to collect a small contribution at the registration desk to cover the refreshments (tea, snacks, and coffee). We appreciate your understanding and cooperation.


Registration for Conference Dinnfer at EA ALMA Science Workshop

  • Registration Form   – now open –
  • Deadline: 11th of September
  •  
  •   Date : 23rd of September, 2025
  •   Venue: Restrant, Vege Marche'19 (Japanese page only), at Inamori Memorial Hall, Kagoshima University
  •   Registration fee: 7,500 yen for everyboty including accompanying person.
  •     - We can accommodate up to about 100 participants.
  •     - Dietary requests (e.g., vegetarian, allergies) can be accommodated within the restaurant’s capacity upon request.


Registration for EA ALMA Data Analysis Workshop

  • Registration Form   – Closed –
  • Deadline: 2nd of June.
  • Thank you very much for registration

Kagoshima is a beautiful place in southern Japan, where nature, tradition, and warm-hearted people come together. With the impressive Sakurajima volcano nearby, soothing hot springs, and a relaxed pace of life, it’s a wonderful destination for both adventure and rest.

Venue　
East Asian ALMA Science Workshop 2025 : Inamori Kaikan, Kagoshima University
  Conference Dinner : Vege Marche'19 at Inamori Memorial Hall, Kagoshima University
East Asian ALMA Data Analysis Workshop 2025 : Graduate School of Science and Engineering, Kagoshima University
– please note that this workshop will be held onsite only. –

Access to
  Kagoshima University
  Inamori Kaikan
  Graduate School of Science and Engineering

Accommodation and Dining
  The Lunch Map around Korimoto Campus, Kagoshima University
    https://maps.app.goo.gl/8KXv1BLymGJJxTnB6
  Hotels in Kagoshima
    https://maps.app.goo.gl/5XiA99TKYympRDd5A

Last updated 20 August 2025