Research theme for competitive and other funds (7):
2021 - 2025 朝貢プロトコルの歴史性-周縁の戦略的選択からみた地域交流システムの再検討-
2014 - 2018 The study of Ryukyu empire and East Asia area of sea -village, ciculation and technology-
2010 - 2014 Diplomacy and Intercultural Contacts in Pre-modern East Asia: A Comparative Historical Research with a special focus on Sino-Japanese Relations during the Ming Period
2008 - 2010 Fundamental Study of Interregional Exchanges Viewed from Gateways for Tribute under the Tributary System of the Ming China
2005 - 2009 Comprehensive Study of Japan-China(Ming) Relation in the Ningbo Area -through Comprehensive Analysis of the Diaries Written by the Missions to Ming-
古琉球期の琉球と明朝における「朝貢」と「貿易」
Study on Tributary relationships and Trade Ryukuu and the Ming Dynasty
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Papers (6):
OKAMOTO Hiromichi. Toward systematical understanding of "Tributary system" in the Ming dynasty:focusing on a construction of a table of tributary cases in the reign of Emperor Xianzong based on Ming shilu. Journal of East Asian cultural interaction studies. 2011. 4. 415-446
A survey of tea culture in Okinawa and further issues. Journal of East Asian cultural interaction studies. 2009. 2. 289-311
Basic research report on Tianhou(Mazu) and Guan Yu temples located at the outer port settlement of Hue in Vietnam. Journal of East Asian cultural interaction studies. 2009. 2. 261-288
Okamoto Hiromichi. Several Aspects of Sea-Going Vessels of Ryukyu Kingdom in Old Ryukyu Period. Journal of East Asian cultural interaction studies. 2008. 1. 221-248
OKAMOTO Hiromichi. The Ming Dynasty's Tributary Relations with Ryukyu and Its Change--Particulary in the 14th and 15th Centuries. The Toyoshi-kenkyu : the Journal of Oriental researches. 1999. 57. 4. 1-35,*39
The Ming Dynasty's Tributory Relations with Ryukyu and Its Chande-Partiqularly in the 14th and 15th Centuries. The Journal of Oriental Researches. 1999. 57. 4. 1-35
Ryukyuan Students sent to China in the Beginning of the Ming Dynasty-Research on Foreign Srudents in the China's National Acedny Based on ┣DB Nan-Yong-Zhi (/)-┫DB. 1996. 6-7. 21-56