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排出量取引の再考：東京のキャップ・アンド・トレード制度における国家の再スケーリングと行政的基盤

Rethinking Emissions Trading: State Rescaling and the Administrative Foundations of Tokyo’s Cap-and-Trade System (原題)

Yasuo Takao

Sustainability📚 査読済 / ジャーナル2026-08-17#炭素価格Origin: Global経営インパクト: 調達リスク対象セクター: cross_sector
DOI: 10.3390/su18168399
原典: https://doi.org/10.3390/su18168399
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🤖 gxceed AI 要約

日本語

本稿は、世界初の都市レベル強制排出量取引制度である東京キャップ・アンド・トレード制度（TCTS）の質的ケーススタディを通じて、都市炭素市場の制度的メカニズムを分析する。TCTSは実際にはベースライン・アンド・クレジット方式に近く、行政的監視、検証、技術指導、省エネ規制と組み合わされている。排出削減は達成されたが、余剰クレジットの蓄積と限定的な取引が市場メカニズムの限界を示す。都市の脱炭素化には炭素価格だけでなく行政能力と制度的学習が重要であると論じる。

English

This article analyzes the institutional mechanisms of urban carbon markets through a qualitative case study of Tokyo's Cap-and-Trade System (TCTS), the world's first mandatory city-level ETS. It finds that TCTS operates more as a baseline-and-credit system, embedded in administrative oversight, monitoring, and energy-efficiency regulation. Despite emissions reductions, surplus credits and limited trading reveal market limits. The study argues that urban decarbonization depends on administrative capacity and institutional learning as much as carbon pricing.

Unofficial AI-generated summary based on the public title and abstract. Not an official translation.

📝 gxceed 編集解説 — Why this matters

日本のGX文脈において

日本のGX文脈では、東京都の排出量取引制度は国レベルのGXリーグや将来のカーボンプライシング導入の参考事例となる。本稿は制度設計の実態と行政の役割を明らかにし、日本の政策立案や企業の排出削減対応に示唆を与える。

In the global GX context

Globally, this paper contributes to emissions trading scholarship by highlighting the administrative and institutional foundations of urban carbon markets, relevant for cities and regions designing ETS under global frameworks like the Paris Agreement. It offers insights for policymakers considering carbon pricing mechanisms beyond national-level systems.

👥 読者別の含意

🔬研究者:Provides a nuanced understanding of how urban ETS actually function, challenging assumptions about market-based instruments.

🏢実務担当者:Highlights the importance of administrative support and regulatory integration for companies participating in emissions trading schemes.

🏛政策担当者:Offers lessons on designing effective urban carbon pricing by combining market mechanisms with administrative capacity and regulatory oversight.

📄 Abstract（原文）

As cities assume growing responsibility for climate mitigation, an important question is whether urban carbon markets can serve as effective instruments of decarbonisation. While emissions trading research has focused primarily on emissions outcomes, less attention has been paid to the institutional mechanisms underlying policy operation. This article addresses this gap through a qualitative case study of the Tokyo Cap-and-Trade System (TCTS), launched in 2010 as the world’s first mandatory city-level emissions trading scheme. Despite its official designation, the TCTS largely follows the logic of a baseline-and-credit system rather than a conventional allowance-based cap-and-trade programme. Drawing on government data, policy documents, academic studies, and interviews, the article examines how emissions trading was adapted to the metropolitan scale through policy mobility, institutional translation, and functional state rescaling. It argues that the TCTS combines carbon trading with bureaucratic oversight, monitoring and verification, technical guidance, and energy-efficiency regulation within an administratively embedded governance framework. Although substantial emissions reductions were recorded among regulated facilities, persistent surplus credits and limited trading reveal the limits of market mechanisms alone. The study shows how globally mobile climate policies are reconfigured through local institutions and metropolitan governance capacities, suggesting that successful urban decarbonisation depends as much on administrative capacity, institutional learning, and sustained regulatory engagement as on carbon pricing.

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