SB Power

What SB Power does

SB Power Corp. (SBパワー株式会社) is a Tokyo-based retail electricity provider and wholly-owned subsidiary of SoftBank Corp., operating in Japan's liberalized power market since 2016. The company supplies electricity to three primary customer segments: individual consumers (via plans such as Shizen Denki, a 100% renewable offering with non-fossil certificates and J-Credit forest conservation contributions; Ouchi Denki, bundled with SoftBank and Y!Mobile telecom services; and Kurashi Denki, a usage-based discount plan), corporate customers (low-voltage power for SMBs and high-voltage/special high-voltage supply for large offices, commercial facilities, and data centers with RE100-compliant environmental options), and other new power retailers (新電力) through BPO services including wholesale power supply, AI-driven demand management, customer information system (CIS) provisioning, and regulatory information services.

The company's technical platform centers on AI and machine learning for electricity demand forecasting and solar generation prediction at 30-minute intervals across 48 daily time slots, enabling optimized procurement through JEPX (Japan Electric Power Exchange) spot market trading and supply-demand balancing. A proprietary supply-demand management system supports real-time monitoring and same-day plan adjustments. The consumer-facing Eco Denki App drives demand response engagement through gamified energy-saving challenges and PayPay point rewards, while a non-fossil certificate agency service enables corporate customers to meet RE100 and carbon neutrality targets. The company also offers home IoT services (CONNECT for child/elderly monitoring, Ouchi Link for smart home management), though these are adjacent rather than core to the electricity business.

SB Power is monetized primarily through usage-based retail electricity tariffs billed monthly (kWh-based) across residential and corporate customers, supplemented by bundled discounts with SoftBank telecom services, BPO service fees from peer new power retailers, and a non-fossil certificate procurement agency. Distribution occurs through SoftBank's nationwide retail shop network, dedicated B2B support centers, online self-service, and the Eco Denki App. The company is 100% owned by SoftBank Corp. and operates across all 9 major Japanese power grid areas (excluding Okinawa), with registered capital of 30 billion JPY.

Name

SB Power

Legal name

SBパワー株式会社 (SB Power Corp.)

Website

https://sbpower.co.jp

Company type

Private

Founded year

2012

Operating status

Operating

Headcount range

1–10 employees

Short description

SB Power is a Tokyo-based, wholly-owned SoftBank Corp. subsidiary that supplies retail electricity to Japanese consumers and enterprises, offers BPO services to other new power retailers, and uses AI-driven demand forecasting and a non-fossil certificate platform to support RE100-compliant renewable energy supply nationwide.

Ownership category

akta.pro rank

Product category

Retail Electricity Supply

NAICS

Electric Power Distribution (221122), Electric Power Generation, Transmission and Distribution (2211), Electric Power Transmission, Control, and Distribution (22112)

SIC

Electric Services (4911), Electric, Gas & Sanitary Services (4900)

akta.pro primary industry

Solar Project Development & IPP (Utility-Scale & Rooftop) (EUAMABAA)

akta.pro secondary industry

Utility-Scale Power Generation Asset Management (EUAEAMAA)

Keywords

• Retail electricity supply
• Renewable energy services
• Demand response management
• Power procurement services
• Electricity distribution

Headquarters

HQ city

Tokyo

HQ country

Japan

HQ region

Asia

Offices1 record

Markets served

GTM type

B2B and B2C

Offering type

Services

Cost components

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

Revenue model

1. Retail Electricity Sales (Consumer): Provides electricity supply to residential customers through plans like Ouchi Denki, Kurashi Denki, and Shizen Denki (natural electricity). Revenue is usage-based, calculated per kWh consumed. Plans often bundle with SoftBank mobile/net services for discounts.
2. Retail Electricity Sales (Enterprise): Supplies low-voltage and high-voltage/special high-voltage electricity to businesses ranging from small stores to large office buildings and data centers. Offers RE100-compliant environmental options for corporate customers.
3. Power Procurement Services (BPO): Provides outsourcing services to other new power retailers including wholesale power supply, demand management, CIS provision, and regulatory information services. Revenue generated through service fees.
4. Low-voltage Power Purchase Service: Purchases excess electricity generated by customers with solar panel systems. (Note: Currently not accepting new applications.)
5. Non-Fossil Certificate Agency Service: Provides non-fossil certificates to corporate customers for RE100 compliance and carbon neutrality efforts.

Pricing tiers

Go-to-market motion3 records

Distribution channels5 records

Marketing channels6 records

Core offering

SB Power is a SoftBank Group retail electricity provider in Japan supplying residential and commercial electricity, including 100% renewable plans, telecom-bundled plans, and usage-based plans. It also operates BPO/wholesale power services for other new power retailers, offering AI-driven supply-demand management, CIS, and regulatory information services.

Product overview

SB Power operates as a SoftBank Group retail electricity company offering a portfolio of consumer and corporate electricity supply services along with BPO outsourcing solutions for new power companies. Consumer offerings include natural_denki (100% renewable residential plan), ouchi_denki (bundled with SoftBank mobile), and kurashi_denki (usage-based discount), supported by the eco_denki_app for demand response. Corporate services cover low-voltage and high-voltage power supply with RE100 environmental options. The BPO division provides wholesale power procurement, AI-driven supply management, customer information systems (CIS), and regulatory information services to other power companies. The company also offers non-fossil certificate procurement for corporate sustainability goals and operates home IoT services including CONNECT and ouchi_link.

Differentiator

Problem solved

Functional benefit

Brands

• おうちでんき (Ouchi Denki): Consumer electricity plan offering 1% savings compared to regulated rates, with discounts when bundled with SoftBank or Y!Mobile services
• くらしでんき (Kurashi Denki)
• 自然でんき (Shizen Denki)
• エコ電気アプリ (Eco Denki App)
• 電力卸供給サービス (Power Wholesale Supply Service)
• 需給代行サービス (Demand/Supply Management Service)
• CIS提供サービス (CIS Provision Service)
• 制度情報サービス (System Information Service)
• 低圧電力サービス (Low-Voltage Power Service)
• 高圧電力サービス (High-Voltage Power Service)

Products and services

• Ouchi Denki (おうちでんき) Residential electricity plan offering 1% discount versus regulated rates, bundled with SoftBank and Y!Mobile mobile and internet services for additional savings.
• Kurashi Denki (くらしでんき) Residential electricity plan offering monthly usage-based discounts on electricity charges.
• Shizen Denki (自然でんき) Residential electricity plan providing effectively 100% renewable energy with zero CO2 emissions using non-fossil certificates, with ¥0 base rate and forest conservation contributions through J-Credits.
• Eco Denki App (エコでんきアプリ) Free smartphone app for SoftBank electricity customers providing electricity bill confirmation, monthly cost prediction, and gamified demand response challenges with PayPay point rewards.
• SoftBank Denki for Biz (Low-Voltage Power Service) Electricity supply service for small-scale stores, offices, and restaurants with stable, affordable power delivery, offered 1% below regulated rates.
• High-Voltage Power Service Electricity supply for large-scale office buildings, commercial facilities, and data centers including RE100-compliant environmental options for high-voltage and extra-high-voltage facilities (capacity starting from 0.1MW).
• Power Wholesale Supply Service (電力卸供給サービス) Wholesale power supply BPO service utilizing SB Power's balancing group to provide stable electricity at relatively-priced terms with minimal market volatility risk. Flat usage rate (JPY/kWh) plus fuel cost adjustment, contract period 1 year+.
• Supply-Demand Management Service (需給代行サービス) Full-service supply management for new power companies including AI-powered demand forecasting, power source positioning via JEPX market trading, simultaneous equivalent monitoring, and real-time plan adjustments.
• CIS Provision Service (CIS提供サービス) Customer information system BPO service providing customer management, electricity usage tracking with BI tools, customer-facing websites, and switching support for new power companies.
• Regulatory Information Service (制度情報サービス) Information service providing easy-to-understand explanations of complex electricity system regulations and market information including JEPX pricing and government/committee updates for new power companies.
• Low-Voltage Power Purchase Service (低圧電力買取サービス) Service purchasing excess electricity generated by customers with solar panel systems (under 50kW). Currently not accepting new applications.
• Non-Fossil Certificate Agency Service (非化石証書代理購入サービス) Non-fossil certificate procurement service for corporate customers enabling RE100 compliance and effectively zero CO2 electricity supply.
• CONNECT (AI IoT Device) AI-equipped IoT device for child homecoming verification and elderly monitoring.
• Ouchi Link (おうちリンク) Home IoT service for integrated smart home management.

Quantifiable outcome

• 30%+ renewable energy supply to SoftBank base stations achieved by end of FY2020
• +3 more outcomes

Named customers1 record

Segments4 records

Ideal customer profiles4 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

AI capability4 records

Feature4 records

Partnerships

One partnership is on record.

• SoftBank Corp.flagshipOthersSoftBank Corp. is the 100% parent company of SB Power Corp. SB Power operates as a subsidiary within the SoftBank Group, leveraging the SoftBank brand, retail network, and technology infrastructure for energy services. The relationship enables bundled telecommunications + energy offerings and shared technology platforms.

Scale indicators5 records

Recent moves11 records

Expansion highlights6 records

Market position

Strengths4 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

Revenue estimate

Valuation estimate

Number of profiles

Profiles8 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 SB Power