The Call for Proposals for Semester S03A saw 195 submitted proposals, requesting a total of 440 nights. The available 72+4TOO nights were awarded to the following 40 proposals. For Intensive Programs, 10 proposals were submitted and 10 nights are awarded to the 2 programs.
| ID | PI Name | Title | Instrument | nights | |
| S03A-010 | Sadanori | Okamura | A Search for Intracluster Planetary Nebulae in the Virgo Cluster | Suprime-Cam | 1 |
| S03A-012 | Jochen | Greiner | Constraining binary models for supersoft X-ray sources | FOCAS | 3 |
| S03A-015 | Bianca | Poggianti | The origin of dwarf galaxies in clusters. | FOCAS | 1 |
| S03A-017 | Ikuru | Iwata | Lyman Break Galaxies at z=5 in the field J0053+1234 | Suprime-Cam | 2 |
| S03A-019 | Koji | Sugitani | Detection of Extra-Solar Planets in the Nearest Star-Forming Region | CIAO+AO | 2 |
| S03A-021 | Motohide | Tamura | AO Imaging Polarimetry of Circumstellar Disks | CIAO+AO | 2 |
| S03A-024 | Hideyo | Kawakita | Formation conditions of ammonia molecules in Kuiper belt comets | HDS | 1 |
| S03A-038 | Masatoshi | Imanishi | Buried AGNs in Ultraluminous Infrared Galaxies | IRCS | 2 |
| S03A-055 | Naoto | Kobayashi | Number Density of Mg II Absorption Systems at z > 3 | IRCS | 2 |
| S03A-058 | Wako | Aoki | Chemical composition of extremely metal-poor stars with carbon excess | HDS | 2 |
| S03A-062 | Yuzuru | Yoshii | Subaru Super Deep Field using Adaptive Optics | IRCS+AO | 3 |
| S03A-064 | Masashi | Chiba | Multi-object Spectroscopy of Stream Stars in the Galactic Halo | FOCAS/MOS | 2 |
| S03A-066 | Masataka | Fukugita | The Mass Assembly History of Field Galaxies | CISCO | 2 |
| S03A-072 | Yasushi | Suto | Deep spectroscopic search for scattered light from extrasolar planets with HDS | HDS | 2 |
| S03A-079 | Toru | Yamada | The Subaru Extrasolar Planet Transit Survey | Suprime-Cam | 2 |
| S03A-088 | Koji | Kawabata | Polarimetry of Supernovae -- Probing the Origin of Asymmetric Explosions | FOCAS | 1TOO |
| S03A-089 | Masami | Ouchi | Unveiling the Large-Scale Structure at the Highest Redshift | Suprime-Cam | 3 |
| S03A-095 | Motohide | Tamura | Do Brown Dwarfs Have Massive Disks? | COMICS | 1 |
| S03A-096 | Jun-ichi | Watanabe | Observational Trial for Determining Time Scale of Space Weathering | IRCS+AO | 1 |
| S03A-101 | Nobuyuki | Kawai | Rapid Follow-up Observation of Gamma-Ray Burst Afterglows using HETE-2 | various | 3TOO |
| S03A-115 | Tohru | NAGAO | The Innermost of Narrow-Line Regions in AGNs Explored by Polarized Light | FOCAS | 2 |
| S03A-117 | Mitsuhiko | Honda | Are crystalline silicates common to Vega-type stars? | COMICS | 1 |
| S03A-122 | Takashi | MIYATA | Spatial Distribution of Crystalline Silicate Around Evolved Stars | COMICS | 2 |
| S03A-124 | Ichi | Tanaka | Spectroscopic Confirmation of a Possible Protocluster around 4C 23.56 at z=2.5 | CISCO | 2 |
| S03A-129 | Carl | Grillmair | The Tidal Tails of Palomar 5: Tracing the Demise of a Globular Cluster | Suprime-Cam | 2 |
| S03A-143 | Tadayuki | Kodama | Panoramic Imaging Survey of Cluster Evolution with Subaru (PISCES) -- 1 | Suprime-Cam | 3 |
| S03A-145 | Hideo | Matuhara | A panchromatic approach to galaxy formation with Subaru and ASTRO-F | Suprime-Cam | 2 |
| S03A-146 | Miwa | Goto | The H3+ Emission from Alleged Gas Giant Proto Planet around HD 141569 | IRCS+AO | 1 |
| S03A-149 | Masanori | Iye | Pilot Survey for Lyman Alpha Emitters at z=7.1 | FOCAS | 2 |
| S03A-152 | Pascale | JABLONKA | Stellar Population of the proto-galaxy MS1512-cB58 (z=2.72) | OHS | 2 |
| S03A-154 | Mikio | Morii | NIR/Optical Emission Properties of Anomalous X-ray Pulsars | IRCS | 2 |
| S03A-163 | Tomonori | Usuda | Direct Determination of the CO/H2 Abundance Ratio in the Outer Galaxy | IRCS+AO | 2 |
| S03A-164 | Toru | Yamada | High-Redshift Luminous Quasars and Galaxy Formation | IRCS+AO | 3 |
| S03A-167 | Kouji | Ohta | Deep K'-band Imaging of Lyman Break Galaxies at z ~ 5 | CISCO | 2 |
| S03A-172 | Ryo | Kandori | Deep NIR Imaging of Compact Globules with and without YSOs -Evolution of Density Structure at the Central Part of Starless/Star-forming Cores- | CISCO | 1 |
| S03A-176 | Hideki | Takami | Water Vapor Atmosphere of Star: Spectro-Calipermetry with AO | IRCS+AO | 2 |
| S03A-178 | Masao | Saito | Direct Adaptive Optics Imaging of a Young Massive Disk-Binary System | CIAO+AO | 1 |
| S03A-191 | Yasuhiro | Hashimoto | NIR Spectroscopy of Extremely Red ROSAT/XMM X-ray Sources | OHS | 2 |
| S03A-203 | Takashi | Onaka | Mid-Infrared Spectroscopy of the Galactic Center | COMICS | 2 |
| S03A-204 | Bahram | Mobasher | Measure of Star Formation Rate for Galaxies at z~ 1 | IRCS | 2 |
| Intensive Programs | |||||
| S03A-IP-2 | Tomonori | Totani | Cluster-Cluster Microlensing Experiment: A Novel Search for Dark Matter | Suprime-Cam | 5 |
| S03A-IP-7 | Satoshi | Miyazaki | Suprime-Cam Weak Lensing Survey over 33 square degrees | Suprime-Cam | 5 |