#Japan #Renewable Energy #Enerbank #Hachinohe

Aomori's Innovative Energy Transition

In a significant milestone for Aomori Prefecture, Hachinohe City is set to become a leader in renewable energy usage for public facilities. Partnering with Enerbank, a Tokyo-based energy solutions company, Hachinohe City is taking steps to transition its electricity supply to 100% renewable energy sources. This initiative marks the first implementation of Enerbank's unique electricity reverse auction service, known as "Ene-Oku," within the Aomori region. Starting from April 2026, one of Hachinohe's public facilities will be powered entirely by renewable energy, showcasing a commitment to both cost reduction and sustainability.

What is Ene-Oku?

Ene-Oku is Japan's only free service that utilizes a reverse auction method to assist electricity consumers in finding optimal pricing for their energy needs. Through this innovative approach, electricity suppliers can participate in the bidding process multiple times while monitoring competing bids. This system encourages suppliers to reduce their prices, thereby offering better deals to consumers. Notably, Ene-Oku supports sustainable energy stipulations and facilitates both digital transformation (DX) and green transformation (GX) initiatives.

Support for Hachinohe City

Enerbank's collaboration with Hachinohe City includes several supportive measures:
1. Creation and organization of specifications related to renewable energy procurement, as well as usage data (provided free of charge).
2. Execution of the reverse auction process, also at no cost to the city.

Auction Results

In January 2026, Hachinohe conducted an auction that resulted in significant savings. Here are the key details:

• - Number of Facilities Involved: 1 (Hachinohe City Hall)
• - Number of Bidding Suppliers: 6
• - Total Bids: 19
• - Starting Auction Price: ¥67,502,626
• - Winning Bid Amount: ¥49,078,525
• - Total Savings: ¥18,424,101
• - Savings Rate: 27.2%
• - Renewable Energy Proportion: 100%

The transition to renewable energy is anticipated to result in a reduction of approximately 900 tons of CO2 emissions, considering the emission factors set by Tohoku Electric Power. Unlike traditional auctions where each supplier is limited to one bid, the reverse auction mechanism employed here allowed suppliers to compete more aggressively, resulting in better pricing for renewable energy plans.

Comments from Hachinohe City Officials

The Administrative Management Section of Hachinohe City expressed satisfaction with the auction's outcomes. They highlighted the challenges faced in reducing electricity costs and emphasized the need for fairness and transparency in procurement processes. Traditional competitive bidding posed difficulties in terms of fee comparison due to varying pricing structures among suppliers, often leading to reduced competition.

By utilizing Ene-Oku to establish a condition of 100% renewable energy as specified in the city’s climate action plan, Hachinohe was able to significantly minimize its carbon footprint while efficiently procuring electricity. The streamlined communication with Enerbank's representatives contributed to a smooth process, culminating in higher-than-expected financial savings.

Future Prospects

Despite the tendency for renewable energy to be priced higher than conventional options under typical market conditions, the reverse auction system allows businesses to secure power at fair rates. As electricity prices fluctuate, navigating the complex energy procurement landscape becomes increasingly challenging. In response, Enerbank aims to support efficient procurement through its digital solutions. The company is also committed to strengthening partnerships with municipalities across Japan, leveraging initiatives like Ene-Oku and green tickets to promote the realization of zero-carbon cities.

For further information on services supporting zero-carbon city initiatives, visit Enerbank's official website.

Company Overview

Company Name: Enerbank Co., Ltd.
CEO: Kenichi Muranaka / Co-Founder
CEO: Jogo Sato / Co-Founder
CTO: Daisuke Sekine / Co-Founder
Location: 2-1-17 Nihonbashi, Chuo-ku, Tokyo, 103-0027, Japan
Established: July 2018
Telephone: 03-6868-8463
Services: Development and operation of electricity auction systems, environmental value trading platforms, solar power equipment matching, and digital concierge services for energy procurement and decarbonization.
Website: Enerbank