It is a troubleshooter.

An obstacle remover is installed under the front head to remove any obstacles falling on the track to prevent the train from crashing and derailing when running at high speed [K 1][O 5]. In winter, the obstacle remover can also remove snow from the track, allowing trains to operate as normal [K 1]. The obstacle remover is also a spoiler for the train, preventing the train from being rolled up by the airflow formed under the carriage when running at high speed [K 1]. In addition, by changing the flow direction of the air, the barrier remover can also prevent the equipment installed under the carriage from accumulating dust [T 3]. The design of the barrier is based on the design of Odakyu's first-generation Romantic Express train 3000 series "SE" and Japan National Railways' 151 series barrier design [T 3] and then strengthened. Initially, it is made of steel like the car body. The 22nd The first batch of vehicles will be made of aluminum [K 1].

The thin iron plate with an inverted "L" shape above the cab is an electrostatic discharge strip, and it also has the function of detecting the voltage of overhead cables [K 2]. This shape, which is very different from the prototype model 1000, has become the trademark of the Shinkansen vehicle series. Although the installation position will be different in different models of vehicles in the future, its shape has not changed much so far (N700 series).