The unsuccessful "new" trains on Nambu Line

Nambu Line is one of the most overcrowded railways in the Greater Tokyo Area, but its branch lines are not well known. So-called Hama-Kawasaki branch line is a commuter rail line between Shitte and Hama-Kawasaki, which is just 4.1 km (2.5 miles) long with five stations in total. The line is in an industrial area so that there are many passengers during rush hours but very few at off-peak times.

The branch line has been served by two-carriage trains, which look like a rural railway. In 2023, JR East introduced "new trains" called E127 series, which were in fact reallocated from Niigata Prefecture. However, they were mostly inactive in 2024 due to "unreliablity" that the company refuses to explain in detail, and thus 35-year-old 205 series trains were reinstated.

At the end of 2024, a trade union referred to the reason why the E127 series trains were temporarily removed from service. The document suggests that train drivers filed a complaint about insufficient air-conditioning especially in a cab. It might have been less of an issue when the E127 series trains were running in Niigata Prefecture where people have to care more about heavy snow than scorching temperature, but it seems to have become a nightmare in Kawasaki and Yokohama cities.

The 205 series trains have remained longer than planned as stopgaps, though two out of three units were sent for scrap in mid-December 2024. This means that there is no choice but to use the E127 series in summer no matter how hot the trains are.

According to the trade union, there is currently no plan of introducing E131 series or any other newer trains to the line. Thus, the only possible solution is installing more powerful air-conditioner or fans on the E127 series trains. Otherwise, the immense heatwave will make drivers ill and thus it would end up with service reduction caused by a shortage of train crew.

JR East: platform edge doors in Tokyo

On Monday 3 March, JR East published the latest plan to install platform edge doors in Tokyo. JR East endeavors to introduce the doors to most stations of major railways in Tokyo area by around March 2032, but somehow a few major stations seem to have been omitted from the list.

The company has been installing the platform edge doors to stations of commuter railways in the Greater Tokyo Area since 2010, resulted in fewer "a person being hit by a train" cases than before. The doors cannot prevent people from committing suicide, but given that most of the cases are caused by blind people (mostly not their fault), intoxicated people (mostly their fault) or those who have concentrated too much on their phone (clearly their fault), the project have paid off.

The document published by JR East contains tables of stations where the platform edge doors will be installed by March 2029. There are two lines that most people are not familiar with, Yamanote Freight Line and Tohoku Freight Line, both of which are now commonly known as Shonan-Shinjuku Line.

It is worth noting that not just commuter railways but also suburban railways are on the list, namely Utsunomiya, Takasaki, Sobu Rapid and Yokosuka Lines as well as Shonan-Shinjuku Line. Since number of doors and their positions are different in some cases (especially when it comes to limited express services), it is not easy to install the platform edge doors to suburban railway stations, but JR East has decided to carry out the work.

Many stations of Chuo Rapid Line are also on the list, as no station on the line has platform edge doors so far. Since all commuter train units will be rearranged from 10 to 12 coaches with two Green Cars (first class coaches) by next week, there will be no obstacle to introduce the platform edge doors. Chuo Rapid Line has been notorious for having too many train disruptions caused by "a person being hit by a train" for more than 50 years, but the number of cases is expected to dramatically decline within a few years.

However, the list does not cover all busy stations in Tokyo. For example, there is no plan so far on Keiyo and Musashino Lines. Given that not even a single station thereof is on the list by 2029, it is hard to believe that the company will do so by 2032.

It might also have affected other lines, especially some Chuo Rapid Line. Kunitachi, Tachikawa, Hino, Toyoda and Hachioji stations are not on the list probably because there are up to four Musashino a day, direct services connecting Hachioji and Omiya via Chuo Rapid and Musashino Lines. Tachikawa is the third busiest station on Chuo Rapid Line so that leaving it without the platform edge doors will certainly be a setback for JR East's commitment to safety. No clarification of the issue has not been explained by the company so far.