#Japan #Kumagaya #RUTILEA #HOBE ENERGY #JESDI

HOBE ENERGY Launches Its First Battery Energy Storage System with the Upper Nara Facility

HOBE ENERGY, located in Minato, Tokyo, has achieved a significant milestone by successfully implementing its proprietary Energy Management System (EMS) at the Upper Nara battery storage facility in Kumagaya, Saitama. The facility, developed by Japan Energy Storage Development Organization (JESDI), is set to play a vital role in supporting Japan's transition to renewable energy. On March 27, 2026, the facility officially began operations, marking HOBE ENERGY's first successful deployment of its battery energy storage system (BESS) in a commercial environment.

Significance in the Age of Renewables

As Japan aims to increase its share of renewable energy, managing the inherent variability of power generation due to weather conditions has become a critical challenge for the country's electricity infrastructure. With the rise of renewable energy, developing battery storage systems that can store excess electricity and discharge it when needed is essential for maintaining grid stability. Energy security remains a significant national concern, particularly as Japan looks to reduce its reliance on imported energy and strengthen its decentralized energy foundation.

In this context, the government's support for deep-tech ventures is intensifying, and expectations for battery and energy management technologies are rising. Battery energy storage is increasingly recognized as a foundational technology to support the expansion of renewable energy and ensure the stability of next-generation power infrastructures. HOBE ENERGY is poised to address these societal needs by offering integrated solutions encompassing the design, procurement, implementation, and operational support of battery systems.

HOBE ENERGY's First Successful BESS Deployment

While HOBE ENERGY has previously established a presence in designing and deploying industrial and residential battery systems, the Upper Nara facility represents a new domain of BESS directly connected to the power grid. This marks the company's first project where a comprehensive solution—from system design to EMS implementation—has been provided seamlessly. Under the leadership of Koichi Okino, who has an engineering background from Fujielectric and ABB, HOBE ENERGY is dedicated to developing and utilizing domestic technologies while contributing to energy security in Japan. This project is a crucial step in that strategic direction.

Identification of installation details:

• - Facility Name: Upper Nara Battery Storage Facility
• - Location: Kumagaya City, Saitama
• - Storage Capacity: 5 MWh (Output 2 MW)
• - Commissioning Date: March 27, 2026
• - Battery System: 5ft Compact Battery System by HOBE ENERGY (LFP)
• - EMS: Proprietary EMS by HOBE ENERGY (market-responsive, real-time control)
• - Construction Partner: E-Top Co., Ltd.
• - Aggregator: RUTILEA Co., Ltd.
• - Project Developer: Japan Energy Storage Development Organization (JESDI)

Technical Features of the Battery Storage

At the core of this battery storage facility is HOBE ENERGY's self-developed EMS. This system goes beyond managing the charging and discharging of batteries; it provides real-time control that anticipates market fluctuations and the variability of renewable energy outputs, facilitated by collaboration with aggregator RUTILEA. The 5ft battery units designed by HOBE ENERGY are easier to transport and install compared to industry-standard 20ft containers, making them suitable for locations with limited access or tight turns. This design allows battery energy storage systems to be established in areas previously constrained by land use, such as old substations or factory sites. Furthermore, the quick turnaround from construction to operational readiness—completed in about four months—demonstrates the potential for rapid market entry.

Future Business Expansion Plans

HOBE ENERGY plans to scale its established one-stop solution for battery storage across Japan, particularly in areas identified as optimal for renewable energy and those where grid reinforcement is needed. The government aims for a renewable energy ratio of 40-50% by the fiscal year 2040 as stated in the 7th Energy Basic Plan, making the need for battery infrastructure to stabilize the grid increasingly urgent. As a dedicated company that can provide all elements from battery system design and procurement to EMS implementation and market connection support, HOBE ENERGY is preparing to meet the growing demand stemming from national policies.

Additionally, beyond lithium-ion batteries, the company is also considering next-generation battery technologies, such as sodium-ion and redox flow batteries, with the objective of offering optimal solutions tailored to specific applications, scales, and cost requirements.

Remarks from HOBE ENERGY Executives

Koichi Okino, CEO of HOBE ENERGY

"The completion of the Upper Nara battery storage facility signifies our first successful implementation of a BESS. It showcases the development and improvement of our proprietary EMS and battery systems in commercial settings. I extend my deepest gratitude to everyone involved, including JESDI’s President Hoshino, our construction partners at E-Top Co., Ltd., and RUTILEA for their operational support. As Japan embraces renewable energy, addressing fluctuations in power supply and enhancing energy security are paramount. This project exemplifies our unified capabilities in offering battery systems and control solutions, ultimately contributing to Japanese energy independence."

Akira Hoshino, President of JESDI

"The commissioning of the Upper Nara facility marks an important step for us in realizing HOBE ENERGY’s first BESS. This project exemplifies the collaboration of different parties, leveraging their unique strengths to bring about results like this. JESDI is committed to combining expertise to ensure the stable implementation of energy storage projects that will contribute to both grid stability and the expansion of renewable energy."

Masahiro Iizuka, President of E-Top Co., Ltd.

"It is an honor to have managed the construction of the Upper Nara battery storage facility while adhering to safety and quality standards. We tailored our execution to the characteristics of HOBE ENERGY's compact battery system, integrating all components and establishing the necessary foundation for operational readiness in the demand response market. Together with JESDI and RUTILEA, we aim to contribute to enhancing battery infrastructure nationwide and balancing power demand and supply."

Takahiro Yasutomi, Senior Project Leader at RUTILEA

"At RUTILEA, we strive to bring AI into everyday business processes. Using our AI-driven electricity trading optimization, we are delighted to participate as an aggregator with JESDI’s battery storage initiative. Following our entry into the demand response market two months post-commissioning at the Aisho battery site, we aim to leverage our technologies in upcoming projects like Upper Nara to enhance stability in power supply and maximize the value of battery storage while contributing to a decarbonized Japan."

Company Overview

HOBE ENERGY Co., Ltd.

• - Company Name: HOBE ENERGY Co., Ltd.
• - CEO: Koichi Okino
• - Head Office: 3F, Toei Nishishinbashi Building, 1-13-5 Nishishinbashi, Minato-ku, Tokyo 105-0003, Japan
• - Business Focus: Battery storage solutions (compact, industrial, sodium batteries, EMS)
• - Website: HOBE ENERGY

Japan Energy Storage Development Organization (JESDI)

• - Company Name: Japan Energy Storage Development Organization (JESDI)
• - CEO: Akira Hoshino
• - Business Focus: Development and promotion of utility-scale battery energy storage systems (BESS)
• - Website: JESDI