High-Energy Astrophysics Lab

From the extreme environments around black holes to the radiation environment on the lunar surface — we tackle the mysteries of the high-energy universe through theory and multi-messenger observations (X-rays, MeV gamma rays, radio, neutrinos, and gravitational waves).
Credit: RIKEN

Research

From fundamental astrophysics to applied radiation science.

01 — FUNDAMENTAL

Fundamental Astrophysics

Uncovering the physics of the high-energy universe — black holes and MeV gamma rays — through theory and multi-messenger observations.

Black Hole Astrophysics

Magnetic field measurements and origin of AGN coronae, jet launching, accretion physics, and extreme physics near the event horizon.

AGN coronae X-ray polarimetry ALMA +1 more

High-Energy Astrophysics (MeV)

Pioneering MeV gamma-ray astronomy and multi-messenger studies.

GRAMS neutrinos blazars
02 — APPLIED

Applied High-Energy and Radiation Studies

Applying our expertise in high-energy astrophysics to real-world radiation challenges of the space age.

Lunar Radiation Environment

Understanding and forecasting the cosmic-ray and radiation environment on the lunar surface for the era of human lunar activity.

cosmic rays solar energetic particles Artemis

News

Paper on neutrino production sites in blazar jets (Xue et al.) accepted by ApJ

Our study locating where high-energy neutrinos are produced in blazar jets has been accepted for publication in The Astrophysical Journal.

Press release: Particle acceleration by shocks around supermassive black holes

Shibaura Institute of Technology issued a press release on our simulation study revealing efficient proton acceleration by shocks in black hole coronae, a new clue to the origin of high-energy neutrinos (Ly et al.).

Press release: Signatures of Lense-Thirring precession around a black hole

Shibaura Institute of Technology issued a press release on our XRISM and NuSTAR study capturing signs of general-relativistic precession of the inner accretion disk (Kawamuro et al.).

Lab website launched

The website of the Inoue High-Energy Astrophysics Lab is now online.

New research grant awarded

Awarded a JSPS Kakenhi Challenging Research (Exploratory) grant.

Recent Publications
  • Kawamuro, T., Yamada, S., Noda, H., Inoue, Y., Ogawa, S., et al. (2026). XRISM Time-resolved Fe Kα Spectroscopy of NGC 4395: Time-variable Inner-disk Emission. The Astrophysical Journal 1005, L62. ADS / arXiv / DOI
  • Ly, M. N., Inoue, Y., Sentoku, Y., Sano, T. (2026). Proton Acceleration by Collisionless Shocks in Supermassive Black Hole Coronae: Implications for High-energy Neutrinos. The Astrophysical Journal 1004, 27. ADS / arXiv / DOI
  • PLUS Science Team, Baba, S., Belli, S., Benotto, P., Delvecchio, I., et al. (2026). GREX-PLUS Science Book v2. arXiv e-prints, arXiv:2606.05237. ADS / arXiv / DOI
  • Sakai, N., Inoue, Y., Owen, E. R. (2026). Revisiting Disk Winds in Active Galactic Nuclei as an Origin of Cosmic Gamma-ray and Neutrino Backgrounds. arXiv e-prints, arXiv:2606.17490. ADS / arXiv / DOI
  • Komugi, S., Saito, T., Michiyama, T., Inoue, Y., Nakanishi, K., et al. (2026). An Active Galactic Nucleus in the Antennae Galaxies?. The Astrophysical Journal 1004, 126. ADS / arXiv / DOI

All publications →

Join Us

We are recruiting graduate students (MSc/PhD), postdocs, and undergraduates. Black holes, gamma rays, neutrinos, or the Moon — if any of these excites you, get in touch.