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Journal Article

Citation

Shimizu Y, Nakano M. J. Japan Soc. Safety Eng. 2018; 57(3): 237-245.

Copyright

(Copyright © 2018, Japan Society for Safety Engineering)

DOI

10.18943/safety.57.3_237

PMID

unavailable

Abstract

Japan is a country with few energy resources on its own and hence must rely on foreign energy resources. Crude oil and natural gas imported to Japan have to pass through geographical choke points that result in a greater risk than most western countries. So far this has not yet been considered enough compared to the potential risk. In this paper we expand the existing energy diversity index consisting of resource concentration risk and country risk by proposing to include a new risk indicator on chokepoint risk. Previously, when comparing energy security by country, it was necessary to integrate different types of measurements and data points. However, this new indicator can directly compare the risks including concentration risk, country risk and chokepoint risk. In addition, as an application example, it is possible to quantitatively and quickly evaluate the change in the degree of energy security degree when shifting a resource import from one country to another country with reduced risk.

国産のエネルギー資源に乏しい日本は,海外の資源に頼らざるをえない.エネルギー・セキュリティの面で,産油国から原油や天然ガスを輸入する際のシーレーン上のチョークポイントリスクは,欧米各国に比べて大きくて重要であるが,これまで十分な考慮がされていない.本稿では,エネルギー多様性指標を使用した資源集中リスク,およびカントリーリスクに加えて,チョークポイントリスクを加味したリスク指標を提案する.従来,エネルギーセキュリティを国別に比較をする際には,それぞれ異なった単位の指標を統合化する必要があるが,この提案する指標は,各国が抱える上記の3 つのリスクを,直接的に比較することができる.また応用例として,資源輸入相手国をリスクの少ない国にシフトした場合のエネルギーセキュリティ度の変化を,簡便に定量評価することが可能である.


Language: ja

Keywords

Choke Point Risk; Country Risk; Diversity Index; Energy Security; エネルギーセキュリティ; カントリーリスク; チョークポイントリスク; 多様性指標

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