What Rexev does

REXEV (株式会社REXEV) is a Tokyo-based private company founded in January 2019 by Takeshi Watanabe (CEO) and Takahiro Morishige (CPO), both former operators at Enaris, which Watanabe led to a 2013 listing on the Tokyo Stock Exchange Mothers market. The company operates eMMP (e-Mobility Management Platform), an integrated software platform that combines EV fleet management, smart charging control via the eMMS energy management system, and participation in Japan's electricity markets (capacity, balancing, and JEPX spot), exposed to customers through REST APIs. REXEV also sells Smart Charger hardware for corporate EV deployments, the Flemobi subscription fleet-management product, and the eemo car-sharing service (whose direct operations are being transferred to Bank Rent-A-Car effective 2026-04-01). The platform integrates with OEM telematics (Mitsubishi Motors, Nissan) and an IoT device layer, and has been verified at 5,000-EV scale under the Tokyo Metropolitan Government's Zero Emission Tokyo VPP demonstration.

The company serves two primary customer segments: Japanese enterprises (MUFG Bank, Sumitomo Corporation, ALSOK, NTT Biz Solutions, Nissan, Logisteed, Odakyu Electric Railway, Yokogawa Rental & Lease) and municipal and utility customers (Okazaki, Kamisu, Shiga Prefecture, Kushiro Gas, Shiojiri, Higashikurume, Iruma, and the Tokyo Metropolitan Government itself). Distribution is delivered through a mix of direct sales and partnerships, notably a 2024-10 capital and business alliance with Fuyo General Lease and channel integrations with NTT's N.mobi app marketplace and NTT West's smart charging infrastructure (2026-06).

The business model spans multiple revenue streams: hardware sales (Smart Chargers), subscription (Flemobi, eMMP API licensing), consulting and advisory fees (EV Introduction Consulting, Green Consulting launched 2024-10, Retail Electricity Provider Service launched 2024-09), transaction-based fees (eemo car-sharing), and outcome-based revenue from capacity market participation (formal entry 2025-04) and VPP dispatch. Adjacent offerings include REXEV e.CYCLE (2026-06-09) for the FIT-to-FIP transition and Battery Co-location Operation and Market Trading Support (2025-09-18). Funding to date includes an approximately $7.16M equity round in 2020-12 led by JAFCO (with aSTART, Kyocera, Osaka Gas, SMFL, Toshiba Corporation), a ¥600M grant from the Tokyo Metropolitan Government in 2022-01, and the 2024-10 undisclosed-value Fuyo alliance.

Name

Rexev

Legal name

株式会社REXEV

Website

https://rexev.co.jp

Company type

Private

Founded year

2019

Operating status

Operating

Headcount range

11–50 employees

Short description

REXEV is a Japanese EV-energy management startup operating the eMMP platform, which integrates EV fleet management, smart charging control, and electricity market participation. It serves Japanese corporations and municipalities with hardware, subscription software, consulting, and VPP/capacity-market services.

Ownership category

akta.pro rank

Product category

E-Mobility Management Software

akta.pro primary industry

EV Charging Network Management & Software Services (CPMS, Monitoring, Billing) (TLAKAMAG)

akta.pro secondary industries

Fuel Management, Idling Reduction & EV Range/Charging Telematics (TLAEAFAH), OEM Embedded Connectivity & Telematics Platforms (TLAEAFAA)

Keywords

• EV fleet management
• Smart charging infrastructure
• Virtual power plant
• EV car sharing
• Energy management software

Headquarters

HQ city

Odawara

HQ country

Japan

HQ region

Asia

Markets served

GTM type

B2B

Offering type

Software

Cost components

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

Revenue model

1. EV導入コンサルティング (EV Introduction Consulting): Consulting fee-based service for EV vehicle and charger selection, installation design, subsidy application support, and operational planning. Delivered to corporations and municipalities evaluating EV adoption.
2. Smart Charger Hardware & Installation: Sale or supply of REXEV-proprietary smart chargers (Plan A 3-6kW, Plan B 6kW charge/discharge, Plan C 10kW charge/discharge, plus outlet-type variants) and associated installation services. Five-year no-running-fee promotional period for basic charger.
3. Flemobi EV Operations Support Subscription: Recurring subscription service combining fleet management (vehicle reservation, mileage tracking) with charging management (price-linked smart charging) for corporate and municipal EV fleets. Includes Standard Plan used by Kamisu City.
4. eemo EV Car-Sharing Franchise & Transaction Fees: Franchise model where municipalities and companies (Kushiro Gas, Sumitomo Corporation, Nippo Gas) operate EV car sharing under the eemo brand; users pay per-minute rental fees (15-minute units). Note: eemo direct operations were succeeded to Bank Rent-A-Car on 2026-04-01.
5. Retail Electricity Provider Energy Management Service: B2B service for retail electricity providers leveraging EV charge/discharge control to reduce procurement costs (shift charging to cheap JEPX hours), reduce capacity market contribution charges, and provide imbalance adjustment. Also supports new EV-related product development consulting.
6. Green Consulting (脱炭素コンサルティング): Carbon management consulting offering (a) decarbonization consulting (roadmap, technology selection, target setting) and (b) decarbonization solution development support (helping enterprises build EV/renewable solutions). Launched as formal service October 2024.
7. Capacity Market / VPP Revenue Sharing: Aggregator revenue share from EV battery capacity market participation. EV owners can earn revenue (e.g., one EV providing ~6kW could earn ¥80,000+/year in 2028 Tokyo area) with proceeds split among EV owner, aggregator, and REXEV.
8. eMMP Platform Licensing / API Access: External API-based licensing of the eMMP platform to enterprises and mobility/energy providers (Odakyu, Nissan, NTT Biz Solutions) for charging control, vehicle management, and data integration. Includes implementation support and customization services.
9. Used EV Brokerage Service: Sales referral / brokerage of used EVs (in cooperation with used car dealer U-POS) to municipalities and corporate buyers at less than half the price of new EVs, plus trade-in of used gasoline/EV vehicles.

Pricing tiers

Go-to-market motion1 record

Distribution channels7 records

Marketing channels7 records

Core offering

REXEV operates a proprietary integrated e-Mobility Management Platform (eMMP) that combines EV fleet/vehicle management, smart charging control (eMMS), and electricity market participation (capacity, balancing, JEPX) via REST APIs. Surrounding the platform are smart charger hardware, the Flemobi fleet operation support service, EV car-sharing business setup (eemo franchise), retail electricity provider energy services, and corporate decarbonization (Green Consulting) and EV introduction consulting.

Product overview

REXEV (株式会社REXEV) operates a platform-plus-modules architecture centered on its proprietary integrated platform eMMP (e-Mobility Management Platform). The eMMP platform combines vehicle (fleet) management, charging control (energy management), and external-system data linkage via REST APIs, and underpins all other REXEV offerings. Surrounding the core platform are: (1) the Smart Charger line (法人EV向け スマート充電器) — chargers from multiple manufacturers paired with REXEV's eMMS energy-management software; (2) Flemobi — a fleet-vehicle-management + charging-management operation-support service; (3) the EV Car-sharing Business Setup Support service, which underpins the 'eemo' sub-brand car-sharing offering; (4) the Retail Electricity Provider Service for procurement and capacity-cost optimization; (5) Green Consulting for corporate decarbonization strategy and solution co-development; (6) EV Introduction Consulting for EV adoption planning and subsidy support; (7) REXEV e.CYCLE for FIT-to-FIP transition and co-located battery operation; and (8) Battery Co-location Operation & Market Trading Support for solar-plant storage operations. The platform also powers several customer-specific deployments including VPP demonstrations, capacity market participation, and PaaS offerings.

Differentiator

Problem solved

Functional benefit

Brands

• eemo: EV-specialized car sharing service (jointly developed with Odawara City and Shonan Electric Power) operated as a franchise platform for corporate and municipal EV car sharing businesses.
• Flemobi (フレモビ)
• eMMP (e-モビリティマネジメントプラットフォーム)
• eMMS (エネルギーマネジメントシステム)
• REXEV e.CYCLE (レクシヴいいサイクル)
• Green Consulting

Products and services

• Smart Charger for Corporate EVs (法人EV向け スマート充電器) EV chargers (regular chargers, V2H charge/dischargers, outlet-type chargers) from multiple manufacturers (Panasonic, Nichicon, Nitto Electric, Wallbox) paired with REXEV's proprietary eMMS energy management system. Provides automatic peak-power control, price-linked smart charging (JEPX), PV-surplus priority charging, and vehicle-management linkage; reported to cut charging electricity cost by up to 30%.
• Flemobi (EV operation support service) Subscription service combining vehicle/fleet management (reservation, mileage tracking, manager dashboards) with smart charging control for corporate and municipal EV fleets. Supports both EV and gasoline vehicles and integrates with the eMMP platform.
• EV Car-Sharing Business Setup Support (EVカーシェア事業立ち上げ支援) Full-package support service for launching EV car-sharing businesses, including vehicle procurement, charger and electrical work, market research, app, and operations support. Customers can operate under their own brand or as a franchise of REXEV's eemo brand.
• eMMP (e-Mobility Management Platform) REXEV's proprietary integrated platform combining car-sharing/fleet management with energy management. Modular REST APIs for charging control, vehicle (fleet) management, and data linkage with power markets/external devices. Externally deployed as a platform-as-a-service offering with development support; integrates Nissan vehicle data via cloud API and Odakyu EMot MaaS app.
• Retail Electricity Provider Service (小売電気事業者向けサービス) B2B service for retail electricity providers to optimize procurement cost and capacity contribution through EV charge/discharge control. Includes charging-time shift to cheap hours, capacity contribution reduction, imbalance adjustment, EV-related product introduction support, and consulting for EV-tariff plans and solution development.
• Green Consulting (グリーンコンサルティング) Decarbonization consulting service for companies facing challenges in net-zero strategy, talent, technology selection, and capital investment. Two service lines: (1) decarbonization consulting (strategy/roadmap/target setting), (2) decarbonization solution development (co-development of EV/renewable energy related solutions).
• EV Introduction Consulting (EV導入コンサルティング) Consulting service supporting EV introduction from selection to subsidy application. Free simulation of EV operation including running cost, CO2 reduction, and optimal EV/charger count based on driving patterns. Handles subsidy application on behalf of customers.
• Used EV Referral Service (with U-POS) Sales referral of affordable used EVs (less than half the new-vehicle price) in cooperation with U-POS to municipalities and corporate buyers, plus trade-in of used gasoline/EV vehicles. Provides battery warranty within typical 8-year/160,000 km coverage.
• REXEV e.CYCLE (FIP transition & battery operation support) End-to-end support for FIT-certified solar generators to migrate to the FIP scheme and install co-located storage batteries operated by REXEV as aggregator. Offers 'maximum FIT price + JPY 1.6/kWh' for FY2026-converted plants. Partnership with Machi Mirai Seisakusho.
• Battery Co-location Operation & Market Trading Support (蓄電池併設の運用・市場取引支援) Service for solar power plant operators facing output curtailment, FIP-transition risk, and imbalance risk. Provides storage battery design/procurement and the REXEV EMS control platform. Targets high-voltage (≥32 JPY FIT) plants initially; planned expansion to low-voltage market. Two schemes: self-investment or third-party-owned.

Quantifiable outcome

• ~20% reduction in EV charging costs via price-linked smart charging (verified ¥46,000 → ¥37,000/month per vehicle/charger)
• +8 more outcomes

Named customers18 records

Segments5 records

Ideal customer profiles5 records

Technology focussed Yes

API detail

Has API

Yes

API docs

API detail

Core technology

AI maturity

App detail

Integration9 records

AI capability3 records

Feature8 records

Scale indicators11 records

Recent moves7 records

Expansion highlights6 records

Direct peers

• Wallbox: Wallbox is a global smart EV charger manufacturer with bidirectional (V2H/V2G) chargers and an energy management platform (myWallbox). REXEV has a documented integration with Wallbox chargers to enable V2H/V2G control via REXEV's eMMS/eMMP — Wallbox is the most direct comparator in smart-charger hardware + cloud EMS, though it operates globally while REXEV is Japan-focused.
• ChargePoint: ChargePoint operates one of the world's largest EV charging networks with a hardware-plus-software platform offering charging management, energy management and fleet tools. Comparable to REXEV in combining smart chargers with cloud software for enterprise/municipal customers, though ChargePoint's scale and North America/Europe footprint dwarf REXEV's Japan-only business.
• Nuvve: Nuvve is a US-based V2G specialist that aggregates EV batteries into grid services (frequency regulation, demand response). REXEV's VPP aggregation and capacity-market entry (April 2025) closely mirror Nuvve's GIVe platform thesis, making it a direct cross-border peer despite operating in different regulatory markets.
• Kinto: Kinto is Toyota's mobility-as-a-service subsidiary offering car-sharing (Kinto Share), subscription (Kinto One) and MaaS in Japan. It directly competes with REXEV's eemo franchise and EV car-sharing launch support business inside Japan, with the difference that Kinto benefits from Toyota balance sheet and OEM scale.
• AutoGrid: AutoGrid (a Schneider Electric company) provides a DERMS platform for distributed energy resource aggregation and VPP operation. Comparable to REXEV's eMMP in providing cloud-based aggregation of distributed assets for grid services, though AutoGrid targets stationary DERs broadly whereas REXEV's wedge is EV-centric.
• Nissan Energy: Nissan Energy is Nissan's internal program to leverage EV batteries for V2H/V2G and grid services, including partnerships with Japanese utilities. REXEV has a documented server-direct API integration with Nissan EVs that powers its charging service — making Nissan both a key data partner and a potential long-term competitor for VPP aggregation revenue.

Broad incumbents

• Enel X Way: Enel X Way is the e-mobility arm of Enel Group, delivering EV charging infrastructure, smart charging software and V2G/VPP services globally, often paired with parent Enel's utility business. Comparable to REXEV in combining utility-scale energy market participation with EV charging, but at vastly greater scale and as part of a multi-vertical incumbent.
• Stem Inc: Stem Inc is a US-listed AI-driven clean energy storage and VPP operator combining software (Athena) with battery aggregation across commercial/industrial sites. Comparable to REXEV's eMMP-driven storage aggregation extension (REXEV e.CYCLE, Battery Co-location service), but Stem is a publicly-traded scaled incumbent while REXEV is a private early-growth company.
• ABB E-mobility: ABB E-mobility is a global incumbent in EV charging hardware and DC fast-charging infrastructure with smart-charging software. Comparable to REXEV in the smart-charger + software combination, but ABB's product portfolio and geographic reach place it as a broad incumbent rather than a direct Japan specialist.

Regional players

• e-Mobility Power: e-Mobility Power is a Japanese public fast-charging joint venture involving TEPCO, Chubu Electric, Hitachi and others. It is the closest Japan-domestic analogue for scaled EV-charging infrastructure provision, although its focus is highway fast-charging rather than REXEV's fleet/smart-charging and VPP niche.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks6 records

Key highlights7 records

Customer concentration

• YouTubeyoutube.com/@eemo-share
• Facebookfacebook.com/REXEV20190123
• LinkedInlinkedin.com/company/rexev

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

Subsidiaries1 record

Funding overview

Funding rounds1 record

Investors6 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 Rexev