68. "TBD"
      The 2nd LHAASO Symposium (20-25 Mar. 2025; Hong Kong, China)

67. "Gamma-ray Bursts at High Energies and Multi-messenger Connections"
      The High-Energy Gamma-ray Universe: Results and Perspectives with Wide-Field Ground-Based Facilities, IAU General Assembly, Focus Meeting 12 (14-15 Aug. 2024; Cape Town, South Africa)

66. "Gamma-ray Bursts: Multi-messenger Synergies"
      II Synergies at New Frontiers (25-26 Mar. 2024; Kashiwa, Japan)

65. "Multimessenger Emission from Weak-Jetted Active Galactic Nuclei (plenary talk)"
      TeV Particle Astrophysics 2023 (11-15 Sep. 2023; Napoli, Italy)

64. "Cosmic rays and diffuse gamma-ray emission from the Milky Way (tentative)"
      The First LHAASO Symposium (29 May -2 Jun. 2023; Chengdu, China)

63. "Multimessenger Emission of Active Galactic Nuclei"
      The Multimessenger Chakra of Blazar Jets, IAU Symposium 375 (5-9 Dec. 2022; Kathmandu, Nepal)

62. "Gamma-ray bursts and their outflows: physics and implications of very high energy emission"
      Physics of Relativistic Jets on All Scales, IAU General Assembly, Focus Meeting 1 (4-9 Aug. 2022; Busan, Korea)

61. "Multi-messenger (Electroweak) Emission from Active Galactic Nuclei"
      Paris Saclay AstroParticle Symposium 2021 (15-19 Nov. 2021; Saclay, France)

--. "TBD"
      Opening a New Window in GRB Physics (28-30 Apr. 2020 -> postponed; Pisa, Italy)

60. "Gamma Ray Bursts at Very High Energies"
      10th International Workshop on Air Shower Detection at High Altitudes (7-10 Jan. 2020; Nanjing, China)

59. "Gamma-Ray Bursts at Very High Energies"
      CTA Linkages Meeting (28-29 Nov. 2019; Adelaide, Australia)

58. "Physics and implications of TeV emission from GRB 190114C detected by MAGIC"
      Gamma-ray Bursts in the Gravitational Wave Era (28 Oct.-1 Nov. 2019; Yokohama, Japan)

57. "Physics and implications of TeV gamma-ray emission from GRBs 190114C and 160821B"
      Multi-Messenger Astrophysics in the Gravitational Wave Era (24 Sep.-25 Oct. 2019; Kyoto, Japan)

56. "High-Energy Neutrinos from Active Galaxies without Strong Jets"
      Perspectives in Astroparticle Physics from High Energy Neutrinos (25-27 Sep. 2019; Berlin, Germany)

55. "High-Energy Neutrinos from Active Galactic Nuclei: The Role of Disk-driven Winds"
      Japan-Israel Workshop on High Energy Astrophysics (18-23 July 2019; Wako and Kobe, Japan)

54. "High-Energy Neutrinos and Gamma Rays from Active Galactic Nuclei without Jets"
      Multifrequency Behaviour of High Energy Cosmic Sources (3-8 June 2019; Palermo, Italy)

53. "GRB Science Prospects at the Dawn of the CTA Era"
      CTA Transient/Multiwavelength Working Group: GRB F2F Meeting (16-18 Jan. 2019; Milano, Italy)

52. "Multi-messenger Transients in the CTA Era"
      The Extreme Universe Viewed in Very-High-Energy Gamma Rays 2018 (12 Oct. 2018; La Palma, Spain)

51. "Short Gamma-Ray Bursts and Neutron Star Mergers at Very High Energy"
      8th International Workshop on Air Shower Detection at High Altitudes (10-13 Dec. 2017; Shanghai, China)

50. "Gravitational wave follow-up at Very High Energy: What do we expect? What do we learn?"
      MAGIC Physics Meeting (26-28 April 2017; Genève, Switzerland)

49. "Status of the Transients Science Working Group"
      CTA Consortium Meeting (24-28 October 2016; Bologna, Italy)

48. "Black Holes Astrophysics with the Cherenkov Telescope Array"
      New Frontiers in Black Hole Astrophysics, IAU Symposium 324 (12-16 Sep. 2016; Ljubljana, Slovenia)

47. "Fast Radio Bursts and Very High Energy Prospects"
      MAGIC Collaboration Meeting (13-17 June 2016; Zürich, Switzerland)

46. "AGN Winds and NGC 1068"
      MAGIC Collaboration Meeting (13-17 June 2016; Zürich, Switzerland)

45. "AGN Physics with CTA: Questions, Goals and Suggestions"
      CTA Large Size Telescope General Meeting (25-29 Jan. 2016; München, Germany)

44. "Probing the Universe with Distant Radio Sources"
      Physics of Cosmic Dawn and Reionization in the SKA Era (18-22 Jan. 2016; Sesto/Sexten, Italy)

43. "GRBs and LST Repositioning Speed"
      CTA Large Size Telescope General Meeting (2-5 Feb. 2015; Annecy, France)

42. "Searching for UHECR Sources with Very High Energy Gamma Rays"
      CTA Large Size Telescope General Meeting (7-10 July 2014; Padova, Italy)

41. "Gamma-Ray Bursts/Extragalactic Transients with CTA"
      CTA Large Size Telescope General Meeting (7-10 July 2014; Padova, Italy)

40. "Gamma-Ray Bursts and Ultrahigh Energy Cosmic Rays in the Multi-Messenger Era"
      Gamma-Ray Bursts in the Multi-Messenger Era (16-19 June 2014; Paris, France)

39. "Gamma-Ray Bursts at Very High Energy: Present and Future"
      The Unquiet Universe (9-14 June 2014; Cefalù, Italy)

38. "CTA Prospects for Gamma Ray Lines from Dark Matter"
      CTA Large Size Telescope General Meeting (14-16 Jan. 2014; Kashiwa, Japan)

37. "Prospects for Gamma Ray Bursts with CTA"
      CTA Large Size Telescope General Meeting (14-16 Jan. 2014; Kashiwa, Japan)

36. "Sources and Acceleration of Ultrahigh Energy Cosmic Rays"
      Multi-messenger Approaches to Cosmic Rays: Origins and Space Frontiers (27-29 Nov. 2013; Paris, France)

35. "Probing the High-z Universe with the Broadband Emission of GRBs"
      GRBs and Their Hosts as Tracers of the High Redshift Universe (21-25 Jan. 2013; Sesto/Sexten, Italy)

34. "The Extragalactic Background Light at High Redshifts"
      The CTA EBL and Cosmology Physics Case (28-30 Nov. 2012; München, Germany)

33. "Gamma-Ray Bursts: Multimessenger Prospects"
      CTA and the Origin of Cosmic Rays (19-21 Nov. 2012; Buenos Aires, Argentina)

32. "MAGIC GRB Key Program"
      MAGIC Collaboration Meeting (12-16 Nov. 2012; Santa Cruz de la Palma, Spain)

31. "Particle Acceleration and Gamma Ray Emission from Blazars"
      Exploring the Non-thermal Universe with Gamma Rays (6-9 Nov. 2012; Barcelona, Spain)

30. "Gamma-ray Absorption in High-Redshift Objects and Cosmic Reionization"
      Near Infrared Background and the Epoch of Reionization (14-15 May 2012; Austin, USA)

29. "GRBs and other transients with CTA"
      Interpreting Signals from Astrophysical Transient Experiments (25-26 Apr. 2012; Buckinghamshire, UK)

28. "GRBs/Transients with Ground-Based Multi-GeV Detectors"
      Multi-GeV Astrophysics with Ground-Based Detectors (12-14 Dec. 2011; Dublin, Ireland)

27. "Extragalactic Science with CTA"
      CTA Consortium Meeting (28 Nov.-2 Dec. 2011; Madrid, Spain)

26. "Prospects for GRB Science with CTA"
      CTA Large Size Telescope General Meeting (10-12 Oct. 2011; München, Germany)

25. "Physics with the Northen Array: GRBs and EBL" (plenary talk)
      CTA Consortium Meeting (18-20 May 2011; Toulouse, France)

24. "Probing Intergalactic Magnetic Fields through Blazar Gamma Rays"
      AGN Physics in the CTA Era (16-17 May 2011; Toulouse, France)

23. "Astrophysical Sources of UHECRs and Gamma-ray Diagnostics"
      Multi-Messenger Astronomy of Cosmic Rays (11-14 Apr. 2011; Beijing, China)

22. "GRB Science with CTA"
      CTA Large Size Telescope General Meeting (8-9 July 2010; Annecy, France)

21. "Gamma-ray Emission from Ultrahigh Energy Cosmic Ray Accelerators"
      Acceleration and Emission Processes at High Energies and their Application to AGN (25-26 Jan. 2010; Paris, France)

20. "Probing the Cosmic Dark Ages with GeV-TeV Gamma-Rays"
      The GeV to TeV Connection (11-16 Jan. 2010; Ringberg, Germany)

19. "Astrophysical Sources of UHECR Nuclei (might not be as disappointing as you think)"
      6th International JEM-EUSO meeting (3-8 Dec. 2009; Wako, Japan)

18. "Gamma-ray Absorption by Cosmic Radiation Fields"
      Cosmic Particles, Jets and Accelerator Science (10-12 Nov. 2009; Tsukuba, Japan)

17. "Can We Search for the First Stars Using GRBs?"
      Japan-Italy Mini Workshop (14-16 Jan. 2009; Tsukuba, Japan)

16. "Acceleration and Propagation of UHECRs from Astrophysical Sources"
      4th International JEM-EUSO Meeting (1-4 Dec. 2008; Torino, Italy)

15. "High-Energy Gamma Rays from Gamma-Ray Bursts and Clusters of Galaxies"
      TeV Particle Astrophysics 2008 (24-28 Sep. 2008; Beijing, China)

14. "High Energy Emission from GRBs"
      High Energy Phenomena in Relativistic Outflows (24-28 Sep. 2007; Dublin, Ireland)

13. "Origin of Ultra High Energy Cosmic Rays" (plenary talk)
      Topics in Underground and Astroparticle Physics (11-15 Sep. 2007; Sendai, Japan)

12. "Astrophysical Origin of Ultra High Energy Cosmic Rays"
      Future Prospects of Ultra High Energy Cosmic Rays (22-23 May 2007; Paris, France)

11. "Astrophysical Origin of Extremely High Energy Cosmic Rays"
      Astronomy and Astrophysics of the Extreme Universe (22-23 Mar. 2007; Wako, Japan)

10. "Particle Acceleration and High Energy Emission by Clusters of Galaxies"
      Astroparticle CPV in Topical Physics (21-24 Feb. 2007; YongPyong, Korea)

9. "Origin of Ultra-High Energy Cosmic Rays"
    Astroparticle CPV in Topical Physics (21-24 Feb. 2007; YongPyong, Korea)

8. "Cosmic Ray Acceleration and High Energy Emission due to Cosmological Structure Formation Shocks"
    Shock Formation Under Extreme Environments in the Universe (20-22 Feb. 2007; Tokyo, Japan)

7. "High Energy Radiation and Cosmic Rays from Clusters of Galaxies"
    Origin, Propagation and Interaction of Energetic Particles (17-19 May 2006; Daejeon, Korea)

6. "Astrophysical Origins of the Highest Energy Cosmic Rays"
    Energy Budget in the High Energy Universe (22-24 Feb. 2006; Kashiwa, Japan)

5. "Gamma-ray and Cosmic Ray Astrophysics of Clusters"
    GLAST Science Workshop (24-25 Nov. 2005; Tokyo, Japan)

4. "Gamma-rays and Cosmic Rays in Large-Scale Structure"
    Cosmic Rays and Magnetic Fields in Large Scale Structure (16-20 Aug. 2004; Busan, Korea)

3. "High Energy Emission from GRBs: Implications for Probing the High-z Universe"
    Science with 5@5 (9-14 Nov. 2003; Ringberg, Germany)

2. "High Energy Particles from Intergalactic Shocks"
    Toward Very High Energy Particle Astronomy (19-21 Mar. 2003; Kashiwa, Japan)

1. "Probing the Nature of the Central Engine in Gamma-Ray Bursts"
    Multifrequency Behaviour of Cosmic High Energy Sources (21-26 May 2001; Vulcano, Italy)

68. "Probing circumgalactic cosmic rays around the Milky Way via GeV-PeV gamma rays and neutrinos"
      8th Heidelberg International Symposium on High-Energy Gamma-Ray Astronomy (Gamma-2024) (2-6 Sep. 2024; Milano, Italy)

67. "Multimessenger signatures of nonthermal processes in weak-jetted active galactic nuclei"
      Black Hole Astrophysics with VLBI 2024 (14-15 Feb. 2024; Mitaka, Japan)

66. "Multimessenger emission from winds and tori in active galactic nuclei"
      38th International Cosmic Ray Conference (26 Jul.-3 Aug. 2023; Nagoya, Japan)

65. "Nonthermal processes in the central regions of radio-quiet active galactic nuclei"
      Black Hole Astrophysics with VLBI 2023 (6-8 Feb. 2023; Mitaka, Japan)

64. "High-energy neutrinos and gamma rays from winds and tori in active galactic nuclei"
      7th Heidelberg International Symposium on High-Energy Gamma-Ray Astronomy (Gamma-2022) (4-8 Jul. 2022; Barcelona, Spain)

63. "Neutrino, gamma-ray and radio emission from winds and tori in active galactic nuclei"
      Black Hole Astrophysics with VLBI 2022 (7-9 Feb. 2022; Kashiwa, Japan + online)

62. "High-energy neutrinos and gamma-rays from the AGN-driven wind and torus in NGC 1068"
      TeV Particle Astrophysics 2021 (25-29 Oct. 2021; Chengdu, China + online)

61. "High-energy neutrinos and gamma-rays from the AGN-driven wind in NGC 1068"
      37th International Cosmic Ray Conference (12-23 Jul. 2021; Berlin, Germany -> online)

60. "High-energy neutrino and gamma-ray emission from AGN-driven winds"
      Black Hole Astrophysics with VLBI: Multi-Wavelength and Multi-Messenger Era (18-20 Jan. 2021; Kashiwa, Japan)

59. "High-energy neutrino and gamma-ray emission from AGN-driven winds"
      Connecting High-Energy Astroparticle Physics for Origins of Cosmic Rays and Future Perspectives (7-10 Dec. 2020; Kyoto, Japan)

58. "High-energy neutrino and gamma-ray emission from the AGN-driven wind in NGC 1068"
      TeV Particle Astrophysics 2019 (2-6 Dec. 2019; Sydney, Australia)

57. "X-raying r-process nucleosynthesis in neutron star mergers"
      Gamma-ray Bursts in the Gravitational Wave Era (28 Oct.-1 Nov. 2019; Yokohama, Japan)

56. "MAGIC Observations of the Nearby Short GRB 160821B: Implications for Afterglow Physics, Neutron Star Mergers and Gravitational Wave Follow-up"
      36th International Cosmic Ray Conference (24 July - 1 Aug. 2019; Madison, USA)

55. "High-Energy Neutrino and Gamma-Ray Emission from AGN-driven Winds"
      High Energy Phenomena in Relativistic Outflows VII (9-12 July 2019; Barcelona, Spain)

54. "GRB 190114C: Interpretation"
      MAGIC Collaboration Meeting (24-28 June 2019; Yerevan, Armenia)

53. "GRB 160821B: update on interpretation"
      MAGIC Collaboration Meeting (19-23 Nov. 2018; Roma, Italy)

52. "Interpreting the electroweak observations of the blazar TXS 0506+056: insights into extragalactic jets, neutrinos and cosmic rays"
      Very High Energy Phenomena in the Universe, 14th Rencontres du Vietnam (12-18 Aug. 2018; Quy Nhon, Vietnam)

51. "IceCube-170922A + TXS 0506+056: Interpretation"
      MAGIC Collaboration Meeting (19-23 Feb. 2018; Zeuthen, Germany)

50. "Cosmic Rays and Non-thermal Emission Induced by Accretion of Cool Gas onto the Outer Galactic Disk"
      Theories of Astrophysical Big Bangs (6-10 Nov. 2017; Wako, Japan)

49. "Rapid follow-up observations of gamma-ray bursts with the MAGIC telescopes"
      35th International Cosmic Ray Conference (13-20 July 2017; Busan, South Korea)

48. "Transients Physics Working Group Report"
      MAGIC Collaboration Meeting (12-16 June 2017; Split, Croatia)

47. "Fast Radio Bursts as Cosmological Probes: Cosmic Reionization and Small-Scale Power Spectrum"
      Fast Radio Bursts: New Probes of Fundamental Physics and Cosmology (12-17 Feb. 2017; Aspen, USA)

46. "On Recent GRB Observations"
      MAGIC Collaboration Meeting (21-25 Nov. 2016; Dortmund, Germany)

45. "Status of the FRB Program"
      MAGIC Collaboration Meeting (21-25 Nov. 2016; Dortmund, Germany)

44. "Gamma Ray Emission from Active Galactic Nucleus winds"
      CTA Consortium Meeting (16-20 May 2016; Kashiwa, Japan)

43. "Fast winds in active galactic nuclei as sources of ultra-high-energy cosmic rays"
      TeV Particle Astrophysics 2015 (26-30 October 2015; Kashiwa, Japan)

42. "Particle acceleration and nonthermal emission from fast winds in active galactic nuclei"
      TeV Particle Astrophysics 2015 (26-30 October 2015; Kashiwa, Japan)

41. "Nonthermal multiwavelength and multimessenger signals from fast winds in active galactic nuclei"
      Prospects, Challenges and Evolution of AGN Modeling in the ASTRO-H Era (21-22 October 2015; Tokyo, Japan)

40. "Gamma-Ray Bursts: Why should we care?"
      MAGIC Physics Meeting (15-19 June 2015; Zeuthen, Germany)

39. "Prospects for Transient Surveys with Divergent Pointing"
      CTA Consortium Meeting (4-8 May 2015; Turku, Finland)

38. "Transients Key Science Project: Discussion"
      CTA Consortium Meeting (22-26 Sep. 2014; Catania, Italy)

37. "Transients Key Science Project for CTA"
      CTA Key Science Projects Meeting (29-30 July 2014; Paris, France)

36. "GRB/Transient(+Multi-messenger) Followup as CTA Key Science Project"
      CTA Key Science Projects Meeting (11-12 Mar. 2014; Barcelona, Spain)

35. "Clusters of Galaxies for CTA Key Science Project"
      CTA Key Science Projects Meeting (11-12 Mar. 2014; Barcelona, Spain)

34. "GRB/Transient Observations as CTA Key Science Project"
      CTA Extragalactic/Fundamental Physics Science Meeting (10-11 Feb. 2014; München, Germany)

33. "Indirect Searches for Dark Matter via Gamma Rays"
      MPI für Physik Retreat Meeting (20-22 Jan. 2014; Bayrischzell, Germany)

32. "Particle Acceleration and Nonthermal Emission from Fast Outflows in Active Galactic Nuclei"
      X-raying the Gamma-Ray Universe: Linking CTA and X-rays (5-7 Nov. 2013; Hakone, Japan)

31. "Synchrotron Gamma Radiation from Ultrahigh Energy Cosmic Ray Nuclei in Gamma Ray Bursts"
      4th Meeting on High Energy Phenonema in Relativistic Outflows (23-26 July 2013; Heidelberg, Germany)

30. "Cosmology with 21cm Absorption in Very High-Redshift Radio Sources"
      SKA Science Workshop in East Asia (5-7 June 2013; Nagoya, Japan)

29. "Prospect for Gamma-Ray Bursts (and other transients) with CTA"
      Extragalactic Gamma-Ray Astronomy with the Cherenkov Telescope Array (18-21 Mar. 2013; Muonio, Finland)

28. "Probing the Small-Scale Power Spectrum of Primordial Fluctuations with 21cm Absorption in High-z GRBs"
      15 Years of Gamma Ray Burst Afterglows (8-12 Oct. 2012; Málaga, Spain)

27. "High-Energy Gamma Rays from Galactic Accretion Events and Implications for Unidentified GeV-TeV Sources"
      5th International Symposium on High Energy Gamma-Ray Astronomy (9-13 July 2012; Heidelberg, Germany)

26. "Probing Cosmic Radiation Fields and Magnetic Fields at Very High z with GRBs"
      Gamma-Ray Bursts in the Era of Rapid Follow-up (18-22 June 2012; Liverpool, UK)

25. "Hadrons in Blazars: Acceleration, Emission and Variability"
      CTA AGN Working Group Meeting (21-22 May 2012; Paris, France)

24. "Probing Cosmic Radiation Fields and Magnetic Fields in the Reionization Epoch with Hard X-rays and MeV-GeV Gamma Rays from High-z GRBs"
      Gamma-Ray Bursts 2012 (7-11 May 2012; München, Germany)

23. "High-Energy Gamma Rays from Galactic Accretion Events and Implications for Unidentified GeV-TeV Sources"
      Gamma-Ray Universe: From Fermi to CTA (13-15 Nov. 2011; Tsukuba, Japan)

22. "GRBs with CTA: Detection Rates and Light Curves"
      CTA Consortium Meeting (8-11 Nov. 2010; Oxford, UK)

21. "Probing the High Redshift Universe with the High-Energy Gamma-Ray and X-ray Emission from GRBs"
      38th COSPAR Scientific Assembly, Scientific Event E12: Probing the High Redshift Universe (18-24 July 2010; Bremen, Germany)

20. "GRB Science with CTA"
      CTA Consortium Meeting (10-12 May 2010; Zeuthen, Germany)

19. "Deciphering the Ancient Universe with High-Energy Gamma-Rays from GRBs"
      Deciphering the Ancient Universe with Gamma-Ray Bursts (19-23 Apr. 2010; Kyoto, Japan)

18. "Probing UV Radiation Fields and Magnetic Fields in the Era of First Star Formation through GeV Gamma-Rays from Very High-z GRBs"
      The Shocking Universe: GRBs and High Energy Phenomena in the Universe (14-18 Sep. 2009; Venezia, Italy)

17. "Gamma-Ray Pair Absorption at Very High Redshifts: Probing UV Radiation Fields in the Cosmic Reionization Era"
      The Sixth Huntsville Gamma-Ray Burst Symposium (20-23 Oct. 2008; Huntsville, USA)

16. "Hard X-ray Emission from Clusters: Theoretical Expectations"
      Japan-Swiss Workshop on High Energy Astrophysics with Suzaku and INTEGRAL (15-17 Apr. 2008; Sagamihara, Japan)

15. "Astrophysical Accelerators of Ultra-High Energy Cosmic Rays"
      Accelerators in the Universe (12-14 Mar 2008; Tsukuba, Japan)

14. "Ultrahigh Energy Cosmic Rays as Heavy Nuclei from Cluster Accretion Shocks"
      30th International Cosmic Ray Conference (3-11 July 2007; Mérida, Mexico)

13. "Gamma-Rays and UHE Cosmic Rays from Clusters of Galaxies"
      The Multi-Messenger Approach to High Energy Gamma-ray Sources (4-7 July 2006; Barcelona, Spain)

12. "Probing the Cosmic Dark Ages with the Broadband Emission of Very High-z GRBs"
      Swift and GRBs: Unveiling the Relativistic Universe (5-9 June 2006; Venezia, Italy)

11. "Exploring the Very High Redshift Universe through GRBs with ALMA and Subaru"
      ALMA Science Working Group Meeting (2-3 Mar. 2006; Mitaka, Japan)

10. "Probing Magnetic Fields in Cluster Outskirts through Hard X-rays and Gamma-rays Induced by Ultra-High Energy Protons"
      The Origin and Evolution of Cosmic Magnetism (29 Aug.-2 Sep. 2005; Bologna, Italy)

9. "⁶Li Observed in Very Metal-Poor Stars by Subaru/HDS and Implications"
    From Lithium to Uranium: Elemental Traces of Early Galactic Evolution, IAU Symposium 228 (23-27 May 2005; Paris, France)

8. "Hard X-rays and Gamma-rays Induced by Ultra-High Energy Protons in Cluster Accretion Shocks"
    Very High Energy Phenomena in the Universe (13-19 Mar. 2005; La Thuile, Italy)

7. "Probing the High-z Universe with GRB Multiwavelength Emission"
    Japan-Italy Seminar on the Formation of the First Generation of Galaxies (2-5 Dec. 2003; Niigata, Japan)

6. "The "Dark Side" of Gamma-Ray Bursts and Implications for Nucleosynthesis of Light and Heavy Elements"
    Origin of Matter and Evolution of Galaxies (7-9 Nov. 2003; RIKEN, Japan)

5. "Probing the Cosmic Reionization History through Dispersion in GRB Radio Emission"
    Gamma-Ray Burst 2nd Research Training Network Meeting (25-27 Aug. 2003; Santorini, Greece)

4. "Synthesis of Light and Heavy Elements in (Failed) Gamma-Ray Burst Fireballs"
    The Origin of the Elements Astrophysics Summer Institute (15-19 July 2002; Tokyo, Japan)

3. "Cosmic Ray Production of ⁶Li by Structure Formation Shocks in the Early Galaxy"
    Nuclei in the Cosmos VII (8-12 July 2002; Fuji-Yoshida, Japan)

2. "Probing the Formation and Evolution of Galaxies and Clusters with Gamma-Rays and Cosmic Rays"
    New Trends in Theoretical and Observational Cosmology (13-16 Nov. 2001; Tokyo, Japan)

1. "Electron Acceleration and Gamma Rays from Blazars"
    Towards a Major Atmospheric Cherenkov Detector III (25-29 May 1994; Tanashi, Japan)

9. Institut de Ciènces del Cosmos, Universitat de Barcelona, Spain
    June-July, 2019 (invitation by Matteo Cerruti)

8. Laboratoire Univers et Théories, Paris Observatory Meudon, France
    May-June, 2017 (invitation by Catherine Boisson & Andreas Zech)

7. Observational Astronomy Group, University of Leicester, United Kingdom
    May, 2011 (invitation by Jim Hinton & Paul O'Brien)

6. Laboratoire Univers et Théories, Paris Observatory Meudon, France
    June-July, 2010 (invitation by Andreas Zech & Helene Sol)

5. Laboratoire Univers et Théories, Paris Observatory Meudon, France
    Jan., 2010 (invitation by Andreas Zech & Helene Sol)

4. Astroparticules et Cosmologie (APC), Paris, France
    May-June, 2007 (invitation by Günter Sigl)

3. Institute for Astrophysics Paris (IAP), Paris, France
    Nov., 2006 (invitation by Elisabeth Vangioni)

2. High Energy Astrophysics Theory Group, Max-Planck-Institute for Nuclear Physics (MPIK), Heidelberg, Germany
    May-June, 2006 (invitation by Felix Aharonian)

1. Arcetri Astrophysical Observatory, Firenze, Italy
    Sep.-Dec., 2000 (invitation by Franco Pacini)

- Institute for Astrophysics Paris (IAP), Paris, France
    Member of Thesis Evaluation Committee for Kumiko Kotera (supervisor: Martin Lemoine)
    Defense 8 Sep. 2009