Japan’s maglev train, which is already the world’s fastest passenger train, has broken its own record.

On a test run on Tuesday, the train reached 375 miles-per-hour which surpassed the previous record of 361 miles-per-hour.

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Japan’s high-speed railways are some of the most advanced transportation systems in the world with hundreds of trains running with minimal delays daily. The maglev train runs on magnetic levitations that hover above the rails and are suspended by powerful magnets. This latest science and engineering differs from typical trains that run on rails, steel and oil, and are faster than Japan’s famous “bullet trains” that also travel at high speeds.

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The maglev train began as a project of Japan Airlines and the national railways. They have undergone decades of testing and trillions of dollars of investment.