OIU       | OIU Journal of International Studies
OTEC      | OTEC
Obihiro   | Research Bulletin of Obihiro University ; Natural science
Obirin    | Obirin Review of International Studies
Observatio| Data of Oceanographic Observations and Exploratory Fishings
Observatio| Meteorological Observations in the Kyoto University Forests
Observator| Journal of the Aerological Observatory
Observator| Publications of the National Astronomical Observatory of Japan / National Astronomical Observatory of Japan
Obstetrics| Advances in Obstetrics and Gynecology
Occasional| [Kagoshima University Research Center for the Pacific Islands] Occasional Papers
Occasional| Occasional Papers
Occational| IDRI Occational Papers
Occidental| Bulletin of the Institute of Oriental and Occidental Studies, Kansai University
Occidental| Slavia Occidentalis Iaponica
Occupation| Asian Journal of Occupational Therapy
Occupation| Journal of Occupational Health
Oceanograp| Bulletin on Coastal Oceanography
Oceanograp| Data of Oceanographic Observations and Exploratory Fishings
Oceanograp| Oceanography in Japan
Ochanomizu| Journal of Gender Studies, Ochanomizu University
Odysseus  | Odysseus
Office    | Journal of Diplomatic Record Office
Oil       | Journal of Japan Oil Chemists' Society
Okajimas  | Okajimas Folia Anatomica Japonica
Okayama   | Acta Medica Okayama
Okayama   | Bulletin of Okayama Prefectural University - Junior College
Okayama   | Persica ; Journal of the English Literary Society of Okayama
Okayama   | Reports of the Research Laboratory for Surface Science, Okayama University
Okayama   | Scientific Reports of the Faculty of Agriculture, Okayama University
Okinawa   | Journal of the Association of Law, The Okinawa International University
Okinawa   | Journal of Foreign Languages, Okinawa International University
Okinawa   | The Journal of Okinawa Folklore Studies
Okinawa   | Okinawa Junior College Review
Okinawa   | The Okinawa Times ; Weekly Times
Okinawa   | Okinawa University Economic Review
Oleo      | Journal of Oleo Science
Oliva     | Oliva
Omika     | Omika Studies in English Language and Literature
Oncology  | Japanese Journal of Clinical Oncology
Online    | Analytical Sciences : X-ray Structure Analytical Online
Optical   | Optical Review
Organizati| Organizational Science
Oriental  | Bulletin [Institute of Christian Culture / Oriental Religions]
Oriental  | Bulletin of the Institute of Oriental and Occidental Studies, Kansai University
Oriental  | The Journal of Oriental Researches
Orientolog| Bulletin of Orientology : Bulletin of the Faculty of Letters, Toyo University ; Ser. of Indian Philosophy
Orthopaedi| The Central Japan Journal of Orthopaedic Surgery & Traumatology
Orthopaedi| Journal of the Eastern Japan Association of Orthopaedics and Traumatology
Orthopaedi| The Journal of the Japanese Orthopaedic Association
Orthopaedi| Tohoku Archives of Orthopaedic Surgery and Traumatology
Osaka     | Annual Report of Osaka Prefectural Radiation Research Institute
Osaka     | Bulletin of the Osaka Museum of Natural History
Osaka     | Bulletin of the Osaka Prefecture University
Osaka     | East Asian Studies; Review of Asian Research Institute Osaka University of Economics and Law
Osaka     | The Human Science Research Bulletin of Osaka Shoin Women's University
Osaka     | Journal of Osaka of Arts
Osaka     | Journal of Osaka Dental University
Osaka     | Memoirs of the Graduate School of Pharmaceutical Sciences Osaka University
Osaka     | Memoirs of the Institute for Protein Research Osaka University
Osaka     | Memoirs of Osaka Electro-communication University ; Natural Science
Osaka     | Memoirs of Osaka Kyoiku University. I, Humanities
Osaka     | Memoirs of Osaka Kyoiku University. IV, Education, pshychology, special education and physical culture
Osaka     | Memoirs of Osaka Kyoiku University. Ser. III, Natural science and applied science
Osaka     | Osaka Journal of Social Services 
Osaka     | Osaka Literary Review
Osaka     | Osaka University Journal of Language and Culture
Osaka     | Southern Osaka University Bulletin
Osaka     | Studies in the Humanities : Bulletin of the Faculty of Literature Osaka City University
Osaka     | Technology Reports of the Osaka University
Osaka     | Theology and the Humanities : Bulletin of Osaka Christian College and Seminary
Otani     | Bulletin of Otani Women's University
Otani     | Research Report in the Graduate School of Otani University
Otemae    | Otemae Journal of Socio-Cultural Studies
Otsuka    | Otsuka Review
Out       | Kansai Time Out
Ova       | Journal of Mammalian Ova Research
Overseas  | Education in Japan ; Journal for Overseas