I was surprised at the article, because this train is taken up in the general news on CNN.
Among rail fans in Japan, the train is nicknamed as "penis", because its shape on the front side is similar to Glans penis.
Anyway, this train is the newest type on Seibu Line, which extends from Tokyo to its suburban Saitama prefecture. Though the rail line mainly plays a role as commuter line, its terminus is one of the famous sightseeing spots. Then, the train is designed for tourists.