The Tobu 90000 series, the first new train on the Tobu Tojo Line in 18 years, began commercial operation on September 26th with a commemorative tour, although the departure ceremony was canceled due to various circumstances.

The 90000 series seemed to be off to a smooth start, even being used on regular trains from the 27th. However, on the 28th, train 91001F was involved in a collision with a deer and was taken out of service. Its future is already uncertain.