What PROSPEC AZ does

PROSPEC AZ Inc. is a privately held Japanese renewable energy developer and operator headquartered in Nagoya, providing one-stop services from project site selection, permitting, and design through construction, asset management, and O&M for solar, wind, biomass, and grid-scale battery storage facilities. The company was founded in March 2001 and re-established as PROSPEC Holdings in 2008, adopting the PROSPEC AZ name in October 2018; it has since grown to a 391-employee group with offices in Nagoya, Tokyo, Ishikawa, and Hakodate and a balance-sheet base of ¥477.5 million in registered capital as of March 2025.

The operating stack spans four power generation lines. The solar portfolio comprises 28 self-developed projects totaling 111,189.52 kW DC / 91,457 kW AC across Toyama, Nagano, Ishikawa, Fukui, Ibaraki, Shiga, and Yamaguchi prefectures, with additional O&M engagements in Hokuriku and Joetsu. The wind footprint covers 348 turbines distributed across Hokkaido (185), Aomori (86), Akita (20), Kochi, Ehime, Nagasaki, and Kagoshima, monitored via SCADA at 370+ sites. Biomass is the most recent vertical, operating at one FIT-certified pruned-branch facility (1,990 kW, Saitama) and with a published 19-project, 2 MW-each pipeline. Battery storage is offered as a grid-stabilization product participating in Japan's capacity, supply-demand adjustment, and wholesale markets. Certifications include NK small wind turbine type certification (March 2016), ISO 9001 (June 2024), a general construction industry license, and a first-class architect office registration.

Revenue is generated through four streams: electricity sales under FIT contracts and corporate PPAs (both off-site and on-site), turnkey EPC services, asset management and O&M for listed and private infrastructure funds, and sales/installation of small-scale wind turbines (3 kW to 498 kW) sourced from Taiwanese and Chinese manufacturers. Customers include institutional investors and infrastructure funds (AM/O&M mandates), corporate renewable energy buyers (corporate PPA), and local governments participating in regional decarbonization initiatives such as biomass industry city concepts. The company has executed three serial subsidiary acquisitions — Akairesu Sales (2020), I.B.S. (2021, the biomass entry vehicle), and Techno Service (2024) — followed by a 2025 consolidation of two subsidiaries into Human Resource&R Co., Ltd.

Name

PROSPEC AZ

Legal name

プロスペクト AZ 株式会社 (PROSPEC AZ Inc.)

Website

https://prospec-az.com

Company type

Private

Founded year

2001

Operating status

Operating

Short description

PROSPEC AZ Inc. is a privately held Japanese renewable energy developer and operator headquartered in Nagoya that delivers one-stop solar, wind, biomass, and battery storage services — from site development and EPC through asset management and O&M — to infrastructure funds, corporate PPA buyers, and local governments across 23+ prefectures.

Ownership category

akta.pro rank

Product category

Renewable Energy Services

NAICS

Solar Electric Power Generation (221114), Wind Electric Power Generation (221115), Biomass Electric Power Generation (221117)

SIC

Cogeneration Services & Small Power Producers (4991)

akta.pro primary industry

Solar PV Power Plant EPC (Utility-Scale) (EUAEAAAG)

akta.pro secondary industries

Wind Power Plant EPC (Onshore/Offshore) (EUAEAAAF), Utility-Scale Power Generation Asset Management (EUAEAMAA), SCADA, Controls & Communications Integration (RTU, Fiber, Networking) (EUAEADAD)

Keywords

• Renewable energy services
• Solar power generation
• Biomass power generation
• Wind power generation
• Battery storage systems

Headquarters

HQ city

Nagoya

HQ country

Japan

HQ region

Asia

Offices3 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Supply Chain, Technology or R&D, Infrastructure, Marketing or Sales

Revenue model

1. Renewable Energy Power Generation and Sales: Develops, constructs, and operates solar, wind, biomass, and battery storage power plants. Revenue generated from selling electricity under FIT (Feed-in Tariff) contracts and through corporate PPA arrangements. Includes O&M services for power plant assets owned by infrastructure funds and investors.
2. EPC (Engineering, Procurement, Construction) Services: Provides turnkey engineering, procurement, and construction services for renewable energy power plants, from site development through grid connection.
3. Asset Management (AM) and O&M Services: Offers administration and operational management for power plant assets, including assets included in listed and private infrastructure funds.
4. Small Wind Turbine Sales and Installation: Sales and installation of small-scale wind turbines including DS-3000, GHRE19.8J, GHRE.FD25-49, and GPS6-500 models from Taiwan and Chinese manufacturers.

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels3 records

Core offering

PROSPEC AZ develops, constructs, and operates renewable energy power plants across four core segments: biomass, wind, solar, and battery storage. The company provides one-stop A-to-Z services covering site selection, permitting, design, construction, and ongoing operations and maintenance (O&M) for renewable energy assets. It serves corporate clients through Power Purchase Agreements (PPAs), infrastructure investors via asset management, and government entities on regional decarbonization initiatives.

Product overview

PROSPEC AZ operates as a comprehensive renewable energy solutions provider offering four core power generation businesses: Biomass, Wind, Solar, and Storage Battery. The company provides one-stop services from project development (A) through O&M (Z), handling site selection, permits, design, construction, and ongoing operations. They also offer Corporate PPA arrangements for both off-site and on-site renewable energy procurement, plus asset management and due diligence services for listed and private infrastructure funds. The company operates as a fabless manufacturer, leveraging partnerships for equipment manufacturing while maintaining in-house development and O&M capabilities.

Differentiator

Problem solved

Functional benefit

Products and services

• Biomass Power Generation (バイオマス発電事業) Wood biomass power generation using pruning materials and general wood chips, generating approximately 2MW per facility with stable base-load power supply. Includes FIT (Feed-in Tariff) utilization and non-fossil certificate issuance capabilities. Target customers include corporate energy buyers and regional biomass industry city initiatives.
• Wind Power Generation (風力発電事業) Wind turbine power generation spanning offshore and land-based installations. Handles development, design, construction, and O&M with SCADA data from 370 locations for power generation forecasting. Product portfolio includes vertical-axis (DS-3000) and horizontal-axis models (GHRE19.8J, GHRE.FD25-49, GPS6-500) ranging from 3kW to 498kW rated output.
• Storage Battery Power Generation (蓄電池発電事業) Grid-connected battery storage systems for power grid stabilization. Systems packaged in containers containing batteries, PCS (Power Conditioning System), and HVAC. Trades in capacity market (kW value), supply-demand adjustment market (ΔkW value), and wholesale market (kWh value).
• Solar Power Generation (太陽光発電事業) Solar power generation with comprehensive services from land acquisition, permits, design, construction to O&M. Portfolio includes 28 self-developed solar power plants totaling 111,189.52kW DC / 91,457kW AC capacity. Also provides O&M services for third-party owned plants in Hokuriku and Joetsu regions.
• Corporate PPA (コーポレートPPA) Corporate Power Purchase Agreement services including both off-site PPA (indirect power supply from remote locations) and on-site PPA (direct power supply on customer premises). Helps clients procure renewable energy directly from power producers over long-term contracts.
• O&M Services (Operations & Maintenance) Comprehensive operations and maintenance services for power generation facilities. Covers monitoring, adjustment, preservation, and maintenance of solar, wind, and biomass plants. Includes DD (due diligence) and asset management (AM) for listed and private infrastructure funds.
• Small Wind Turbine Sales and Installation Sales and installation of small-scale wind turbines including DS-3000, GHRE19.8J, GHRE.FD25-49, and GPS6-500 models from Taiwan and Chinese manufacturers. Distributed in Japan for small-scale wind power applications.

Named customers5 records

Segments4 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

AI capability1 record

Feature5 records

Partnerships

Three partnerships are on record, tiered core.

• 株式会社よしみね (Yoshimine Co., Ltd.)coreStrategic or Co-development Partner · 1 March 2024Equipment supplier for the Riene Higashi Matsuyama Biomass Power Plant (1,990 kW output) in Saitama Prefecture. Yoshimine provides the biomass combustion equipment using pruned-branch wood chips as fuel. The plant began commercial operation in March 2024.
• JFEエンジニアリング株式会社 (JFE Engineering Corporation)coreStrategic or Co-development PartnerEquipment manufacturer for the Komoro Biomass Power Plant in Nagano Prefecture, currently under construction with commercial operation planned for January 2025.
• 三菱重工パワーインダストリー株式会社 (Mitsubishi Heavy Industries Power IDA)coreStrategic or Co-development PartnerEquipment supplier for the Suzuka Biomass Power Plant in Mie Prefecture, currently in test operation with commercial operation planned for October 2024.

Scale indicators7 records

Recent moves7 records

Expansion highlights6 records

Direct peers

• Pacifico Energy: Japan-focused independent power producer and EPC developer of utility-scale solar, wind, and battery storage projects with both FIT and corporate PPA revenue. Directly comparable in technology mix, customer segments (infrastructure funds, corporates), and one-stop development model.
• Shizen Energy Inc. Japanese renewable energy IPP developing solar, wind, and biomass projects with integrated EPC, O&M, and PPA offerings. Comparable across technology portfolio breadth and institutional-fund/corporate customer base.
• Renewable Japan Co., Ltd. Japanese renewable energy company operating solar and battery storage assets under FIT and PPA structures. Comparable in multi-technology IPP model and asset-light development capabilities.
• GreenPower Investment Co., Ltd. Japanese solar and battery storage developer/operator selling electricity under FIT and corporate PPA. Highly comparable on solar project economics, PPA structuring, and asset management services to infrastructure funds.

Broad incumbents

• Eurus Energy Holdings: Larger established Japanese renewable energy IPP with extensive wind and solar operating assets and O&M services. Overlaps in wind O&M and renewable power generation but is significantly larger and more internationally diversified.
• NTT Anode Energy: Subsidiary of NTT focused on renewable energy power generation including solar, wind, and biomass across Japan. Comparable in technology mix and PPA focus but backed by a much larger telecom parent with different capital structure.
• Marubeni Power Business Division: General trading house with significant renewable energy IPP operations including solar, wind, and biomass globally and in Japan. Overlaps with PROSPEC AZ across all four renewable technologies but operates as part of a much larger conglomerate portfolio.
• Mitsubishi Corporation Power Solution Group: Major trading house with renewable energy power generation and battery storage operations in Japan. Overlaps in multi-technology renewable IPP and grid-scale storage, but within a vastly larger diversified group.
• Tokyo Gas (Renewable Energy Division): Utility expanding into renewable power generation including solar and biomass under PPA structures in Japan. Comparable in corporate renewable procurement offerings but operates as part of a regulated utility with different financing profile.
• SB Energy Corp. SoftBank Group's renewable energy subsidiary operating large-scale solar and wind plants in Japan. Overlaps in utility-scale renewable power generation and corporate PPA structuring but with significantly larger project scale and parent backing.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks7 records

Key highlights7 records

Customer concentration

Compliance4 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles9 records

Subsidiaries3 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about PROSPEC AZ