Enerbank Japan

What Enerbank Japan does

Enerbank Japan Co., Ltd. (株式会社エナーバンク) is a Tokyo-based energy procurement technology company founded in July 2018 that operates Japan's only dedicated electricity reverse auction platform under the brand name Eneoku (エネオク). The platform enables corporations and government agencies to source retail electricity supply contracts from a network of more than 30 retail electricity providers through competitive multi-round bidding, with pricing available across high-voltage, low-voltage, and extra-high-voltage categories. Enerbank's product suite has expanded beyond the core auction service to include Green Ticket (グリーンチケット), a marketplace for environmental value certificates (FIT non-fossil certificates, green power certificates, and J-Credits); Sorareco (ソラレコ), a solar PV installation matching service that simultaneously evaluates PPA, lease, and self-owned procurement paths; and Enepark (エネパーク), a free digital concierge platform that integrates the other three services with smart-meter data ingestion, market intelligence, and chat support. The platform has facilitated more than 30,790 auction transactions and approximately ¥315 billion in cumulative procurement volume for over 130 government organizations and major enterprises such as Nitori Holdings, Rinnai, Mitsubishi Foods, TBM, and Kawasaki City.

The company's revenue model is structured as a take-rate on auction transactions: electricity buyers (corporations and municipalities) use Eneoku at no cost, while winning retail electricity providers pay commission based on contract volume and price. Environmental value certificate procurement and solar matching generate additional transaction and facilitation fees. Distribution is hybrid — direct field sales teams target public-sector accounts and large enterprises, inside-sales and webinars serve mid-market buyers, and an introduction partner program leverages financial institutions and consulting firms for referrals. Enerbank maintains ISO/IEC 27001:2022 certification, is accredited by the International Accreditation Service (MSCB-113), and has been featured in Japan's Ministry of Environment public procurement guide for renewable energy.

Enerbank raised ¥820 million in Series B funding in November 2025 from SMBC Venture Capital (via an impact investment framework), Mizuho Capital, Mitsubishi UFJ Capital, and Dai-ichi Life Insurance. The capital is earmarked for product development of the energy data platform, expansion of the GX (green transformation) support business to enterprise and government buyers, and organizational build-out. As of June 2026, the company employs 70 people, a substantial scale-up from a small founding team, and operates regional project offices for joint procurement initiatives in Osaka, Kyoto, Nagasaki, Itami, and Sakai. The leadership team comprises three co-founders — Kenichi Muranaka (Representative Director), Shogo Sato (Representative Director/COO), and Daisuke Sekine (CTO) — alongside functional executives including a CHRO and CFO with prior investment banking experience.

Name

Enerbank Japan

Legal name

株式会社エナーバンク (Enerbank Co., Ltd.)

Website

https://enerbank.co.jp

Company type

Private

Founded year

2018

Operating status

Operating

Headcount range

1–10 employees

Short description

Enerbank Japan operates Japan's only electricity reverse auction platform (Eneoku), enabling corporations and municipalities to source power and environmental value certificates from 30+ retailers through competitive bidding. The platform serves 130+ government agencies and major enterprises, with average electricity cost reductions of 15%.

Ownership category

akta.pro rank

Product category

Energy Procurement Platform

NAICS

Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services (518)

SIC

Electric & Other Services Combined (4931)

akta.pro primary industry

Cross-Border EAC Trading & Compliance (Multi-registry, Multi-jurisdiction) (EUAGAFAJ)

Keywords

• Power reverse auction
• Electricity procurement platform
• Environmental value trading
• Renewable energy sourcing
• Decarbonization services

Headquarters

HQ city

Tokyo

HQ country

Japan

HQ region

Asia

Offices2 records

Markets served

GTM type

B2B

Offering type

Software

Cost components

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

Revenue model

1. Auction Transaction Fees: Enerbank charges transaction fees to retail electricity providers (小売電気事業者) who win auctions through the Eneoku platform. Electricity buyers (companies and municipalities) use the service free of charge. Revenue is generated when winning retailers pay a commission based on the contracted electricity volume and price.
2. Green Ticket Environmental Value Trading: Enerbank facilitates procurement of FIT non-fossil certificates, green power certificates, and J-Credits for corporate clients. Revenue is earned through service fees on the procurement and delivery of environmental value certificates.
3. Sorareco Solar Matching Services: Revenue from solar power installation matching services, including PPA, lease, and self-owned procurement paths. Enerbank supports the evaluation and selection of installation contractors through the Sorareco platform.

Pricing tiers

Go-to-market motion3 records

Distribution channels4 records

Marketing channels8 records

Core offering

Enerbank Japan operates a platform that enables businesses and municipalities to procure electricity through reverse auctions conducted among 30+ retail electricity providers, with supporting services for environmental value certificate trading (Green Ticket), solar PV installation matching (Sorareco), and a digital concierge for energy procurement (Enepark). The service is provided free of charge to electricity buyers, with Enerbank earning transaction-based commissions from winning retailers.

Product overview

Enerbank Japan operates a unified energy procurement and decarbonization platform comprising four interconnected services: the reverse auction service エネオク (Eneoku) as the core electricity procurement mechanism, the environmental value trading platform グリーンチケット (Green Ticket) for FIT non-fossil certificates, green power certificates, and J-credits, the solar equipment matching service ソラレコ (Sorareco) supporting PPA/lease/self-owned solar procurement, and the digital concierge platform エネパーク (EnePark) that integrates all three services for comprehensive energy cost optimization and decarbonization support.

Differentiator

Problem solved

Functional benefit

Brands

• Eneoku ( Eneoku ): Power procurement DX and renewable energy purchasing through Japan's only power reverse auction service, enabling organizations to find optimal electricity contracts from nationwide retail electricity providers.
• Enepark ( Eneopark )
• Green Ticket ( Gurintiketto )
• Sorareco ( Sorareko )

Products and services

• Eneoku (エネオク) - Power Reverse Auction Japan's only electricity reverse auction service enabling businesses and municipalities to procure electricity and renewable energy through competitive bidding by multiple power retailers, facilitating cost reduction and decarbonization.
• Green Ticket (グリーンチケット) - Environmental Value Trading Environmental value trading platform handling FIT non-fossil certificates, green power certificates, and J-credits, enabling companies to procure environmental value separately from electricity contracts.
• Sorareco (ソラレコ) - Solar PV Matching Japan's only solar power equipment matching service enabling simultaneous comparison of three procurement methods (PPA, lease, self-owned) to support selection of solar installation providers.
• Enepark (エネパーク) - Digital Concierge Service Free digital concierge service for corporate energy procurement and decarbonization that aggregates market information, supports energy cost reduction and decarbonization execution, and integrates with Eneoku, Green Ticket, and Sorareco.

Quantifiable outcome

• Average electricity cost reduction of 15%, maximum 44%, across 30,790+ auctioned facilities with ¥315 billion cumulative procurement volume
• +5 more outcomes

Named customers11 records

Segments3 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

Two partnerships are on record, tiered core and minor.

• 30+ Retail Electricity Providers (小売電気事業者)coreChannel Partner/ Reseller/ DistributorOver 30 retail electricity providers participate in the Eneoku reverse auction platform as bidders. These companies register as partners with Enerbank and compete in auctions to win electricity supply contracts from government and enterprise buyers.
• WeWork (Workspace Partner)minorOthersEnerbank's Tokyo headquarters is located within WeWork KANDA SQUARE, providing flexible office space and infrastructure.

Scale indicators10 records

Recent moves7 records

Expansion highlights6 records

Direct peers

• EnergySage: US-based solar marketplace where consumers and businesses compare installation quotes from competing providers. Directly comparable to Enerbank's Sorareco solar matching service, with similar transaction-fee economics and a neutral platform positioning.
• Lumenaza: Germany-headquartered green power platform enabling utilities and direct marketers to source renewable energy certificates and manage customer relationships. Closest functional analog to Enerbank's combined Green Ticket and Eneoku offering in a deregulated market.
• Choose Energy: US electricity marketplace aggregating retail electricity provider offers for consumers and small businesses. Comparable marketplace mechanics for retail electricity selection, though services consumers rather than enterprises and municipalities.
• Power Ledger: Australia-based platform for peer-to-peer energy trading and environmental attribute certificate tracking. Comparable to Enerbank's Green Ticket environmental value trading platform and broader marketplace approach to renewable energy procurement.
• EnPowered: Netherlands-based energy procurement SaaS for businesses, providing automated supplier switching and contract optimization. Comparable to Eneoku's analytical features for demand profiling and tariff recommendation, with similar enterprise and SMB customer segments.

Emerging players

• Piclo: UK-based flexibility marketplace matching grid assets with demand-response and ancillary services. Comparable marketplace model for energy services, though focused on flexibility rather than retail procurement.

Broad incumbents

• Uplight: US-based energy management platform serving utilities and energy retailers with customer engagement, energy efficiency, and demand response solutions. Broader portfolio than Enerbank but overlaps at the intersection of energy data and customer decarbonization.
• Schneider Electric (EcoStruxure): Global energy management and automation conglomerate offering procurement advisory, energy monitoring, and decarbonization software. Comparable at the enterprise-and-municipal energy procurement level, though as part of a much broader portfolio of products.
• Origis Energy: US-based renewable energy developer and PPA provider. Comparable to Sorareco's PPA pathway and to Enerbank's role in facilitating renewable energy procurement contracts, though Origis operates as a developer rather than a neutral marketplace.

Regional players

• Looop: Japan-based solar electricity retailer and PPA provider. Comparable as a Japan-based renewable energy market participant and potential supply-side entrant into Sorareco's ecosystem, though Looop operates a generator rather than a marketplace.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks5 records

Key highlights7 records

Customer concentration

• Xx.com/eneoku_enerbank
• Facebookfacebook.com/enerbankinc
• LinkedInlinkedin.com/company/enerbank

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles14 records

Funding overview

Funding rounds3 records

Investors9 records

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 Enerbank Japan