Daiwa Commits ¥100 Billion to Battery Storage, Targeting Japan's AI Power Demand

Daiwa's ¥100 billion investment in battery storage is a direct response to the surging electricity demand from Japan's growing AI data center and semiconductor sectors.

Supportive government policies, particularly the Long-Term Decarbonization Auction (LTDA) that guarantees 20 years of fixed revenue, have significantly lowered the investment risk.

The entry of major corporations like SoftBank into the domestic battery market validates the high growth potential and creates a more robust ecosystem for energy storage solutions.

Daiwa Group has announced a major ¥100 billion (approx. $630 million) investment in grid-scale battery storage in Japan by 2030.

This strategic move is best understood as a response to two powerful, converging trends: the massive power crunch driven by AI and data centers, and Japan's supportive policies for energy storage. The timing is critical, as Japan’s long-term energy outlook is being completely reshaped.

First, there's the undeniable demand pull. For years, Japan's electricity consumption was projected to decline. However, a January 2026 forecast from the grid monitor OCCTO reversed this trend, predicting a 5.3% rise in total power consumption by 2035. The sole driver of this net increase is the voracious energy appetite of data centers and semiconductor plants, which are expected to add 56.8 TWh of demand. This creates a clear and urgent need for flexible capacity like Battery Energy Storage Systems (BESS) to stabilize the grid.

Second, the investment risk has been substantially reduced by government policy. Japan’s Long-Term Decarbonization Auction (LTDA) provides a 20-year fixed-revenue contract for storage assets. This transforms BESS from a speculative venture dependent on volatile market prices into a bankable asset with predictable cash flows. The recent auction in May 2026, which awarded another 1.25 GW of storage, confirmed the durability of this policy, giving a green light to large-scale financial players like Daiwa.

Finally, the industrial ecosystem is maturing. Just a week before Daiwa's announcement, SoftBank launched its own gigawatt-hour-scale battery manufacturing initiative aimed at data centers. This move not only validates the market's long-term potential but also signals the growth of a domestic supply chain, which reduces execution risks for large investment programs. Daiwa is therefore stepping into a market where demand is clear, revenue is secured, and the supply chain is strengthening.

BESS (Battery Energy Storage System): A technology that captures energy, stores it as electricity, and releases it when needed. It helps to balance power supply and demand on the grid.
Long-Term Decarbonization Auction (LTDA): A Japanese government mechanism designed to support investment in low-carbon energy sources by offering long-term, fixed-price contracts, thereby ensuring revenue stability.
Flexible Capacity: Power generation or storage resources that can be quickly ramped up or down to manage fluctuations in electricity supply and demand, which is crucial with intermittent renewables and high-demand centers.

Daiwa Commits ¥100 Billion to Battery Storage, Targeting Japan's AI Power Demand

Daiwa's ¥100 billion investment in battery storage is a direct response to the surging electricity demand from Japan's growing AI data center and semiconductor sectors.

Supportive government policies, particularly the Long-Term Decarbonization Auction (LTDA) that guarantees 20 years of fixed revenue, have significantly lowered the investment risk.

The entry of major corporations like SoftBank into the domestic battery market validates the high growth potential and creates a more robust ecosystem for energy storage solutions.

Daiwa Group has announced a major ¥100 billion (approx. $630 million) investment in grid-scale battery storage in Japan by 2030.

BESS (Battery Energy Storage System): A technology that captures energy, stores it as electricity, and releases it when needed. It helps to balance power supply and demand on the grid.
Long-Term Decarbonization Auction (LTDA): A Japanese government mechanism designed to support investment in low-carbon energy sources by offering long-term, fixed-price contracts, thereby ensuring revenue stability.
Flexible Capacity: Power generation or storage resources that can be quickly ramped up or down to manage fluctuations in electricity supply and demand, which is crucial with intermittent renewables and high-demand centers.