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- 저자 : Hanaoka Shinya (검색결과 5 건)
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Structural changes in the cruise network by ship size in Northeast Asia
Ito Hirohito,Hanaoka Shinya,Sugishita Kashin 한국해운물류학회 2022 The Asian journal of shipping and Logistics Vol.38 No.4
Several ports want cruise ships to call at their ports for economic benefits. However, the main cause of concern is the complexity of port selection behavior for cruise lines. Tracking cruise ship movement data may help them understand the port selection behavior of cruise lines. This study aimed to examine the structural changes in the cruise network by ship size in Northeast Asia from 2014 to 2019 using network science methods with automatic identification system data. We identified five key findings. First, the number of nodes and edges in the mega- and small-size ship networks was growing rapidly. Second, the small-size network was growing with unique characteristics of low density and average clustering coefficient, and high average shortest path length and diameter. Third, the hub ports of Shanghai in the megaand Hiroshima and Kobe in the small-size had gained more degrees over time. Fourth, owing to the deployment of new mega-ships in Shanghai, existing large- and mid-ships were shifting to different ports. Finally, modularity of all sizes increased over time, and the community structure became clearer. © 2022 The Authors. Production and hosting by Elsevier B.V. on behalf of The Korean Association of Shipping and Logistics, Inc. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
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Tagawa Hoshi,Kawasaki Tomoya,Hanaoka Shinya 한국해운물류학회 2021 The Asian journal of shipping and Logistics Vol.37 No.2
Hub-and-spoke (HS) networks are cost-effective because they allow the realization of economies of density. However, the cost of point-to-point (PP) networks may be lower than that of HS networks when certain conditions, such as cargo demand, bunker price, vessel size, and the shippers’ value of time change. This study explores the factors that influence the cost-effectiveness of HS and PP networks. We developed a mixed-integer programming model that allows for bi-level optimization between shipping lines and shippers. As a case study, we applied it to Chinese and Japanese ports, with both HS and PP networks. We found that high cargo demand increases the use of PP networks while enlarging vessel size increases the use of HS networks. These findings enable us to predict the occurrence of hubbing—shifting from a PP to an HS network—and de-hubbing—shifting from an HS to a PP network.
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The central tendency of the seaport-fulcrum supply chain risk in Indonesia using a rough set
Do. Bagus Muhammad Reza,Hanaoka Shinya 한국해운물류학회 2022 The Asian journal of shipping and Logistics Vol.38 No.4
Seaports are crucial in modern global supply chain networks and systems, exerting a significant impact on the ecological area's economy. Supply chain entities play a substantial integration role, and potential threats at seaports harm chain continuity. This study proposes a rough set-based genetic algorithm, to investigate the central tendency in seaport risk implied by supply chain threats through a questionnaire evaluation. We also employ the risk score to observe the level of clarity in terms of risk probability, showing that the lower the score an attribute obtains, the more likely it is that seaport risk implies supply chain disruption. We deploy 24 risk attributes, which threaten the proposed ten-dimensional factors, based on their risk scores. The results show that the lack of storage risk planning, low punctuality of delivery goods, shortage of port capacity, congestion in waterways, and the lack of distribution risk planning, are the "best five" of the seaport-fulcrum supply chain risk, in the context of Indonesian seaport firms. These identified risk attributes not only assist seaport managers to identify potential risk-associated deficiencies of supply chain disruption but also enhance their ability to determine resilience to manage supply chain problems. © 2022 The Authors. Production and hosting by Elsevier B.V. on behalf of The Korean Association of Shipping and Logistics, Inc. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
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Kawasaki Tomoya,Tagawa Hoshi,Watanabe Toshihiro,Hanaoka Shinya 한국해운물류학회 2020 The Asian journal of shipping and Logistics Vol.36 No.1
This study simultaneously explores the effects of “consolidation” and “privatization” of ports that are located in proximity to one another. The main benefit of consolidation is assumed to be economies of scale due to the aggregation of container cargo in one port, while that of privatization is cost reduction for port management and operations. We employ a multi-agent simulation model to express interactions among stakeholders, such as a port management body, shipping company, and shipper. The model is applied to a case study for the Kobe and Osaka ports in Japan. We find that consolidation has a larger impact than privatization in terms of cargo volume and total surplus. In particular, if future container cargo increases, consolidation accelerates the increase in cargo volume of the Kobe and Osaka ports. Transshipment cargo receives the largest volume in the case of “consolidation and privatization” when future container demand is increasing. However, the Busan port in South Korea, competitor of the Kobe and Osaka ports for transshipment cargo, would remain dominant even after the consolidation and privatization of the Kobe and Osaka ports, since its vessel frequency would be high in all cases.
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Chathumi Ayanthi KAVIRATHNA,Tomoya KAWASAKI,Shinya HANAOKA 한국해운물류학회 2018 The Asian journal of shipping and Logistics Vol.34 No.2
The hub port competition has intensified beyond regional boundaries, resulting in the port of Colombo competing with the Southeast Asian hub ports of Singapore, Klang, and Tanjung Pelepas in the transshipment market. This study analyzes the competitiveness of Colombo as a transshipment hub in “hub and spoke” and “relay” networks. Shipping lines evaluate the selection criteria for transshipment hub ports and the performance of competitive hub ports. The generalized cost approach together with a discrete choice model is used to assess port choice behavior by estimating the transshipment market share of hub ports and analyzing several scenarios. The results reveal Colombo’s lack of competitiveness in relay networks and most of the feeder ports in hub and spoke networks, mainly due to its high deviation from trunk sea routes and lower performance in some non-quantitative criteria. Singapore has dominant market share in relay networks and for most feeder ports in hub and spoke networks, mainly due to its high performance in non-quantitative criteria, except Pipavav and Nhava Sheva, dominated by Colombo.
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