Tsutomu Miyata

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The purpose of this study is to clarify the impact of structural changes in the market and distribution of seafood on fisheries in Southeast Asia. We conducted interview surveys with local fishermen, middlemen, and wholesalers in the seafood industry around the Batan Estuary in the Philippines. Results showed that, in the study area, the number of fishermen(More)
Y. Urata(1)(2), Y. Nakada(3), T. Miyata(3), T. Aoki(3), T. Soyano(3), K. Tarusawa(3), H. Mito(3), S. Nishiura(3), T. Tamagawa(1)and K. Makishima(1)(4) (1) RIKEN (Institute of Physical and Chemical Research), 2-1 Hirosawa, Wako, Saitama 3510198, Japan (2) Department of Physics, Tokyo Institute of Technology, 2-12-1 Oookayama, Meguro-ku, Tokyo 152-8551, Japan(More)
We estimated the demands of Japan’s cod and pollock markets, taking into account unknown structural changes. We used monthly wholesale price and quantity data between January 2004 and July 2013 at the Tsukiji market in Tokyo, Japan. Structural break tests detected multiple structural changes in the targeted period. A price-dependent demand model with(More)
Observations were made of the optical afterglow of GRB020813 (Fox, Blake & Price, 2002) with the KISO observatory 1.05 m Schmidt telescope and the Bisei astronomical observatory 1.01 m telescope. Four-band (B, V,R, and I) photometric data points were obtained from 2002, August 13 10:52 to 16:46 UT, or 0.346−0.516 days after the burst. In order to(More)
This study examines the changes in market demand for wakame seaweed before and after the Great East Japan Earthquake. For this purpose, we use scanner data comprising prices, quantity, brands, countries/places of origin, and product types of wakame for ten regional markets during the period 2005–2014. The Japanese seafood market suffered from the direct and(More)
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