The incident occurred at the Tanegashima Space Center when the second-stage engine, containing about 18 tons of solid fuel, experienced higher-than-expected combustion pressure 49 seconds into the test, JAXA officials said. No injuries were reported.
"We are extremely sorry that we were unable to meet expectations," JAXA project manager Takayuki Imoto said at a press conference. "We can learn from failure. We will take advantage of this opportunity to develop a more reliable rocket."
The failure raises concerns about JAXA's planned Vietnamese satellite launch by March 2025, potentially affecting Japan's position in the competitive satellite launch market.
The previous engine explosion occurred in July 2023 at the Noshiro Testing Center in Akita Prefecture.
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