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太陽光發電

市場調查報告書

商品編碼

1957086

日本屋頂太陽能發電市場規模、佔有率、趨勢和預測：按併網類型、最終用戶和地區分類，2026-2034年

Japan Rooftop Solar Market Size, Share, Trends and Forecast by Grid Type, End User, and Region, 2026-2034

出版日期: 2026年02月01日 | 出版商:

IMARC | 英文 135 Pages | 商品交期: 5-7個工作天內

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簡介目錄

2025年，日本屋頂太陽能市場規模達45.18億美元。展望未來，IMARC Group預測，到2034年，該市場規模將達到76.664億美元，2026年至2034年的複合年成長率（CAGR）為6.05%。日本政府正穩步加強相關政策和獎勵，以支持可再生能源的發展。此外，日本不斷上漲的電費也推動了市場成長。同時，光電技術的持續創新也促進了日本屋頂太陽能市場佔有率的擴大。

日本屋頂太陽能發電市場的發展趨勢：

政府獎勵和政策支持

由於政府加強對可再生能源的支持政策和獎勵，日本屋頂太陽能發電產業正穩步發展。日本致力於2050年實現碳中和，並透過補貼、稅收優惠和淨計量政策等方式推動屋頂太陽能發電的發展。住宅和企業用戶擴大受益於上網電價補貼（FIT）等機制，這些機制確保了剩餘電力的收益。此外，建築規範中日益嚴格的能源標準也促進了新建和現有建築中太陽能發電系統的安裝。透過國家能源計畫並與《巴黎協定》等國際框架保持一致，日本正在增強投資者對太陽光電技術的信心。公私合營和城市層面的舉措進一步加速了屋頂太陽能發電的普及，使其成為日本全面能源轉型策略的關鍵支柱。東京都政府設定了「碳減半」目標，即2030年將溫室氣體排放減少50%，以鼓勵推廣可再生能源。從 2025 年 4 月起，將引進一項新制度，強制要求安裝太陽能發電設備。

電費上漲

由於依賴高成本的石化燃料進口以及供應鏈中斷，日本的電費持續上漲。根據能源新聞報道，繼上月上漲24%之後，受需求增加的影響，2024年7月30日電費上漲了3%。隨著公用事業成本的上升，住宅和商業用戶對屋頂太陽能發電系統表現出越來越濃厚的興趣，將其視為實現能源獨立和長期降低成本的途徑。這種經濟需求正使屋頂太陽能發電不僅成為環保的選擇，也成為經濟實惠的選擇。人們正在計算投資回收期，並意識到太陽能板價格的下降和政府補貼使得屋頂太陽能發電系統具有誘人的獲利潛力。此外，隨著日本越來越容易受到全球能源市場波動的影響，屋頂太陽能發電等分散式能源解決方案的吸引力也不斷增強。透過自發電，住宅和企業主可以避免因價格波動而帶來的損失。這種經濟獎勵正在推動屋頂太陽能發電系統的持續普及，尤其是在能源需求高且擁有可用屋頂空間的都市區和郊區。

技術進步

由於採用光電技術的不斷創新，日本各地的屋頂太陽能系統正變得越來越有效率、經濟實惠且易於安裝。先進的面板設計具有高能量轉換效率，即使在空間有限的城市環境中，也能幫助住宅和企業產生更多電力。同時，智慧型能源管理系統和電池儲能解決方案的整合，最大限度地提高了自用率，並減少了對電網的依賴。日本科技公司正積極研發下一代太陽能材料，例如雙面面板和鈣鈦礦電池，這些材料預計在各種光照條件下都能表現出色。此外，輕質軟性面板的改進也拓展了老舊建築和各種屋頂形狀的安裝可能性。更高的耐用性和更長的保固期，加上這些技術進步，增強了終端用戶的信心，並推動了日本屋頂太陽能市場的成長。 2025年，Enphase Energy宣布其IQ8™微型逆變器將在日本上市。這項突破性舉措源自於該公司與日本領先的貿易公司伊藤忠商事株式會社建立的經銷合作夥伴關係。東京的住宅屋頂通常面積較小，這往往為設計高效的太陽能發電系統帶來挑戰。 Enphase 的 IQ8 微型逆變器透過靈活且擴充性的解決方案，提高了太陽能發電的產量和可靠性，從而解決了這個難題。

本報告解答的主要問題

日本屋頂太陽能發電市場至今發展狀況如何？未來幾年預計又將如何發展？
日本屋頂太陽能發電市場以併網方式分類是怎樣的？
日本屋頂太陽能發電市場的最終用戶細分市場組成是什麼？
日本屋頂太陽能發電市場按地區分類的情況如何？
日本屋頂太陽能發電市場價值鏈的不同階段有哪些？
日本屋頂太陽能發電的主要促進因素和挑戰是什麼？
日本屋頂太陽能發電市場的結構是怎麼樣的？主要參與者有哪些？
日本屋頂太陽能發電市場競爭有多激烈？

The Japan rooftop solar market size reached USD 4,518.0 Million in 2025 . Looking forward, IMARC Group expects the market to reach USD 7,666.4 Million by 2034 , exhibiting a growth rate (CAGR) of 6.05% during 2026-2034 . The Government is steadily strengthening its policies and incentives to support renewable energy. This, along with the inflating electricity prices in Japan, is impelling the growth of the market. Besides this, continuous innovations in photovoltaic (PV) technologies are expanding the Japan rooftop solar market share.

JAPAN ROOFTOP SOLAR MARKET TRENDS:

Government Incentives and Policy Support

The Japanese rooftop solar industry is experiencing steady growth as the Government is strengthening its policies and incentives to support renewable energy. The nation's determination to become carbon-neutral by 2050 is providing support for rooftop solar in the form of subsidies, tax incentives, and supportive net-metering policies. Homeowners and businesses alike are increasingly deriving advantage from such schemes as the feed-in tariff (FiT), leading to the utilization through the prospect of secure returns on excess power generation. In addition, energy standards in building regulations are also strengthened, driving new and old buildings in that direction for solar installations. Through coordination between national energy planning and global arrangements like the Paris Agreement, Japan is enhancing investors' confidence in solar technology. Public-private partnerships and city-level initiatives are further accelerating the rooftop solar deployment, making it a key pillar in Japan's overall energy transition strategy. The Tokyo metropolitan government, targeting its "carbon halving" goal of bringing the city's greenhouse gas output down by 50% by 2030, is also encouraging the promotion of renewable power. Beginning from April 2025, the new system imposing the installation of solar power is installed.

Rising Electricity Prices

Electricity prices in Japan are increasing, driven by the country's dependence on costly fossil fuel imports and supply chain disruptions. According to energynews, in 2024, electricity prices in Japan skyrocketed 3% on July 30, following a 24% increment owing to high energy requirements. As utility costs skyrocket, residential and commercial customers are increasingly looking to rooftop solar systems as a way of achieving energy independence and saving on long-term energy costs. This economic imperative is turning rooftop solar into not only an environment friendly option but also a financially savvy one. People are calculating the payback periods and discovering that, with declining solar panel prices and government incentives, rooftop systems are yielding attractive returns. In addition, Japan's exposure to global energy market volatility is increasing the attractiveness of decentralized energy solutions such as rooftop solar. By producing their own electricity, home and business owners are shielding themselves from uncertain rate increases. This economic incentive is continuing to raise the adoption levels, particularly in urban and suburban areas where there is a high demand for energy and there is available rooftop space.

Technological Advancements

Continuous innovations in photovoltaic (PV) technologies are making rooftop solar systems more efficient, affordable, and easier to install across Japan. Advanced panel designs with higher energy conversion efficiencies are allowing homeowners and businesses to generate more power even in space-constrained urban environments. Simultaneously, the integration of smart energy management systems and battery storage solutions is enabling people to maximize self-consumption and reduce dependence on the grid. Japanese tech firms are actively developing next-generation solar materials, including bifacial panels and perovskite cells, which are promising superior performance in varying light conditions. Additionally, improvements in lightweight, flexible panels are broadening installation possibilities on older buildings and diverse roof types. By offering better durability and longer warranties, these technological upgrades are boosting end user confidence, impelling the Japan rooftop solar market growth. In 2025, Enphase Energy, Inc. announced the shipment of IQ8(TM) Microinverters to Japan. The milestone follows a distribution partnership with ITOCHU Corporation, one of the largest trading companies in Japan. As residential rooftops in Tokyo tend to be compact, it is often difficult to design effective solar systems. Enphase's IQ8 Microinverters counter this obstacle through flexible, scalable solutions that improve solar energy yield and reliability.

JAPAN ROOFTOP SOLAR MARKET SEGMENTATION:

Grid Type Insights:

On-Grid
Off-Grid

End User Insights:

Industrial
Commercial
Residential

Regional Insights:

Kanto Region
Kansai/Kinki Region
Central/ Chubu Region
Kyushu-Okinawa Region
Tohoku Region
Chugoku Region
Hokkaido Region
Shikoku Region

The report has also provided a comprehensive analysis of all the major regional markets, which include Kanto Region, Kansai/Kinki Region, Central/ Chubu Region, Kyushu-Okinawa Region, Tohoku Region, Chugoku Region, Hokkaido Region, and Shikoku Region.

COMPETITIVE LANDSCAPE:

The market research report has also provided a comprehensive analysis of the competitive landscape. Competitive analysis such as market structure, key player positioning, top winning strategies, competitive dashboard, and company evaluation quadrant has been covered in the report. Also, detailed profiles of all major companies have been provided.

KEY QUESTIONS ANSWERED IN THIS REPORT

How has the Japan rooftop solar market performed so far and how will it perform in the coming years?
What is the breakup of the Japan rooftop solar market on the basis of grid type?
What is the breakup of the Japan rooftop solar market on the basis of end user?
What is the breakup of the Japan rooftop solar market on the basis of region?
What are the various stages in the value chain of the Japan rooftop solar market?
What are the key driving factors and challenges in the Japan rooftop solar?
What is the structure of the Japan rooftop solar market and who are the key players?
What is the degree of competition in the Japan rooftop solar market?

1 Preface

2 Scope and Methodology

2.1 Objectives of the Study
2.2 Stakeholders
2.3 Data Sources
- 2.3.1 Primary Sources
- 2.3.2 Secondary Sources
2.4 Market Estimation
- 2.4.1 Bottom-Up Approach
- 2.4.2 Top-Down Approach
2.5 Forecasting Methodology

3 Executive Summary

4 Japan Rooftop Solar Market - Introduction

4.1 Overview
4.2 Market Dynamics
4.3 Industry Trends
4.4 Competitive Intelligence

5 Japan Rooftop Solar Market Landscape

5.1 Historical and Current Market Trends (2020-2025)
5.2 Market Forecast (2026-2034)

6 Japan Rooftop Solar Market - Breakup by Grid Type

6.1 On-Grid
- 6.1.1 Overview
- 6.1.2 Historical and Current Market Trends (2020-2025)
- 6.1.3 Market Forecast (2026-2034)
6.2 Off-Grid
- 6.2.1 Overview
- 6.2.2 Historical and Current Market Trends (2020-2025)
- 6.2.3 Market Forecast (2026-2034)

7 Japan Rooftop Solar Market - Breakup by End User

7.1 Industrial
- 7.1.1 Overview
- 7.1.2 Historical and Current Market Trends (2020-2025)
- 7.1.3 Market Forecast (2026-2034)
7.2 Commercial
- 7.2.1 Overview
- 7.2.2 Historical and Current Market Trends (2020-2025)
- 7.2.3 Market Forecast (2026-2034)
7.3 Residential
- 7.3.1 Overview
- 7.3.2 Historical and Current Market Trends (2020-2025)
- 7.3.3 Market Forecast (2026-2034)

8 Japan Rooftop Solar Market - Breakup by Region

8.1 Kanto Region
- 8.1.1 Overview
- 8.1.2 Historical and Current Market Trends (2020-2025)
- 8.1.3 Market Breakup by Grid Type
- 8.1.4 Market Breakup by End User
- 8.1.5 Key Players
- 8.1.6 Market Forecast (2026-2034)
8.2 Kansai/Kinki Region
- 8.2.1 Overview
- 8.2.2 Historical and Current Market Trends (2020-2025)
- 8.2.3 Market Breakup by Grid Type
- 8.2.4 Market Breakup by End User
- 8.2.5 Key Players
- 8.2.6 Market Forecast (2026-2034)
8.3 Central/ Chubu Region
- 8.3.1 Overview
- 8.3.2 Historical and Current Market Trends (2020-2025)
- 8.3.3 Market Breakup by Grid Type
- 8.3.4 Market Breakup by End User
- 8.3.5 Key Players
- 8.3.6 Market Forecast (2026-2034)
8.4 Kyushu-Okinawa Region
- 8.4.1 Overview
- 8.4.2 Historical and Current Market Trends (2020-2025)
- 8.4.3 Market Breakup by Grid Type
- 8.4.4 Market Breakup by End User
- 8.4.5 Key Players
- 8.4.6 Market Forecast (2026-2034)
8.5 Tohoku Region
- 8.5.1 Overview
- 8.5.2 Historical and Current Market Trends (2020-2025)
- 8.5.3 Market Breakup by Grid Type
- 8.5.4 Market Breakup by End User
- 8.5.5 Key Players
- 8.5.6 Market Forecast (2026-2034)
8.6 Chugoku Region
- 8.6.1 Overview
- 8.6.2 Historical and Current Market Trends (2020-2025)
- 8.6.3 Market Breakup by Grid Type
- 8.6.4 Market Breakup by End User
- 8.6.5 Key Players
- 8.6.6 Market Forecast (2026-2034)
8.7 Hokkaido Region
- 8.7.1 Overview
- 8.7.2 Historical and Current Market Trends (2020-2025)
- 8.7.3 Market Breakup by Grid Type
- 8.7.4 Market Breakup by End User
- 8.7.5 Key Players
- 8.7.6 Market Forecast (2026-2034)
8.8 Shikoku Region
- 8.8.1 Overview
- 8.8.2 Historical and Current Market Trends (2020-2025)
- 8.8.3 Market Breakup by Grid Type
- 8.8.4 Market Breakup by End User
- 8.8.5 Key Players
- 8.8.6 Market Forecast (2026-2034)

9 Japan Rooftop Solar Market - Competitive Landscape

9.1 Overview
9.2 Market Structure
9.3 Market Player Positioning
9.4 Top Winning Strategies
9.5 Competitive Dashboard
9.6 Company Evaluation Quadrant

10 Profiles of Key Players

10.1 Company A
- 10.1.1 Business Overview
- 10.1.2 Products Offered
- 10.1.3 Business Strategies
- 10.1.4 SWOT Analysis
- 10.1.5 Major News and Events
10.2 Company B
- 10.2.1 Business Overview
- 10.2.2 Products Offered
- 10.2.3 Business Strategies
- 10.2.4 SWOT Analysis
- 10.2.5 Major News and Events
10.3 Company C
- 10.3.1 Business Overview
- 10.3.2 Products Offered
- 10.3.3 Business Strategies
- 10.3.4 SWOT Analysis
- 10.3.5 Major News and Events
10.4 Company D
- 10.4.1 Business Overview
- 10.4.2 Products Offered
- 10.4.3 Business Strategies
- 10.4.4 SWOT Analysis
- 10.4.5 Major News and Events
10.5 Company E
- 10.5.1 Business Overview
- 10.5.2 Products Offered
- 10.5.3 Business Strategies
- 10.5.4 SWOT Analysis
- 10.5.5 Major News and Events

11 Japan Rooftop Solar Market - Industry Analysis

11.1 Drivers, Restraints, and Opportunities
- 11.1.1 Overview
- 11.1.2 Drivers
- 11.1.3 Restraints
- 11.1.4 Opportunities
11.2 Porters Five Forces Analysis
- 11.2.1 Overview
- 11.2.2 Bargaining Power of Buyers
- 11.2.3 Bargaining Power of Suppliers
- 11.2.4 Degree of Competition
- 11.2.5 Threat of New Entrants
- 11.2.6 Threat of Substitutes
11.3 Value Chain Analysis