Why did TEPCO halt the Niigata No. 6 reactor?

An alarm indicated minor electrical leakage during testing at Kashiwazaki-Kariwa No. 6. TEPCO paused power generation to investigate and run safety checks. The company aims to identify the root cause before setting a new timeline. The halt prioritizes safety and compliance, and it likely delays the planned March 18 commercial start.

How could the restart delay affect TEPCO stock performance?

A delay extends reliance on pricier LNG and coal, which can pressure margins and earnings. That can weigh on sentiment and keep day-to-day moves elevated. If TEPCO delivers a clear fix, regulator comfort, and a new schedule, confidence could improve. Until then, the market may trade the headlines in a defined range.

What price levels should investors watch on 9501.T?

We are tracking ¥596 to ¥628 as support and ¥660 to ¥667 as near-term resistance. A decisive close above the 50-day average near ¥663.52 could ease pressure. A break below the lower band near ¥596 risks further downside. Levels may shift quickly on restart news, so use alerts and stops.

Is TEPCO stock cheap at 0.33x price-to-book?

The low price-to-book suggests discounted expectations, but it reflects risks. Earnings are negative, leverage is notable with a 2.13 debt-to-equity ratio, and liquidity is tight. If nuclear output resumes reliably, returns could improve. Without that, the discount may persist. Balance valuation with safety, timing, and cash flow visibility.

Global Market Insights

9501.T Stock Today: March 15 TEPCO Halts Niigata Unit, Restart Delayed

ByHuzaifa Zahoor March 15, 2026

TEPCO stock is in focus after Tokyo Electric Power halted power generation at Kashiwazaki-Kariwa No. 6 in Niigata following an alarm for minor electrical leakage. The move likely delays the March 18 commercial restart, a key profit driver. Shares of 9501.T last traded near ¥640.5, with volatility elevated. A longer restart timeline keeps earnings tied to costlier thermal output and raises headline risk. We break down the market reaction, the incident details, and what investors in Japan should watch next.