N700A

N700A
Name	N700A
Service	2013–present
Manufacturer	* Hitachi * Kawasaki Heavy Industries * Nippon Sharyo * Kinki Sharyo
Family	N700 series
Yearconstruction	2007–2019
Yearservice	2013
Formation	16 cars per set (typical)
Operator	* Central Japan Railway Company * West Japan Railway Company
Depots	Nagoya Station, Tokyo Station
Carbody	Aluminium alloy
Maxspeed	300 km/h (operational)
Gauge	1,435 mm

N700A is a Japanese high-speed electric multiple unit used on Tokaido Shinkansen services operated by Central Japan Railway Company and West Japan Railway Company. It is an incremental evolution of the N700 series incorporating targeted improvements in traction, braking, and active suspension to enhance reliability on routes connecting Tokyo Station, Shin-Osaka Station, and Nagoya Station. The type entered service in 2013 and has been deployed alongside related fleets on scheduled and special services for Golden Week and major events.

Design and Development

The N700A program began from collaboration among JR Central, JR-West, Hitachi, Kawasaki Heavy Industries, and Nippon Sharyo to address operational issues identified during trials with the original N700 and earlier 700 series Shinkansen sets. Design priorities included retrofitting Yokohama-area operational timetables, reducing wear observed around junctions such as Maibara Station, and improving passenger comfort on busy corridors feeding into Shinagawa Station. Engineers referenced aerodynamic findings from wind tunnel work influenced by studies at University of Tokyo laboratories and applied lessons from rolling stock deployed for Expo 2005 and testing associated with JR East research projects. Manufacturing coordinated with suppliers used in projects for Tokyo Metro and components common to E235 series EMUs.

Technical Specifications

The N700A retains a 16-car formation using aluminium-alloy car bodies and articulated bogie arrangements similar to those in the N700, with traction motors, regenerative braking, and inverter control developed by teams that had previously worked on hardware for Series 700 and E5 Series Shinkansen projects. Power electronics were refined in consultation with Mitsubishi Electric and Toshiba engineering groups, and bogie dynamics were validated against standards influenced by research at Kyoto University and Osaka University. Primary systems include ATC derived from Japanese Railway Technical Research Institute protocols, air conditioning systems meeting specifications used on Nozomi and Hikari services, and active yaw dampers updated after analysis of data from testing on the Sanyo Shinkansen corridor near Himeji. Typical operational maximum speed is 300 km/h, with acceleration and braking profiles tuned for timetable integration with services terminating at Shin-Osaka Station and passing through Nagoya Station.

Operational History

N700A sets entered revenue service in 2013 on Tokaido Shinkansen runs, operating alongside earlier N700 and 700 series trains for Hikari and Nozomi services. Deployment phases were coordinated with timetable revisions announced by JR Central and fleet transfers managed with oversight from Ministry of Land, Infrastructure, Transport and Tourism policies. N700A sets have been used during major travel periods tied to New Year and Obon holiday peaks, and were assigned additional services during events such as matches in the 2019 Rugby World Cup and cultural festivals in Kyoto. Incidents prompting operational reviews referenced comparisons with incident reports from JR East and procedures aligned with responses to disruptions on corridors near Shin-Kobe Station.

Safety and Performance Improvements

Safety enhancements in N700A focused on braking redundancy, wheel slide protection, and real-time diagnostics integrating subsystems supplied by firms with pedigrees in Mitsubishi Electric and Fujitsu projects. Improvements followed analyses of service performance data similar to studies produced by the Railway Technical Research Institute and risk assessments used by International Union of Railways-informed practices. Structural and crashworthiness features took cues from standards applied during procurement of rolling stock for Tokyo Olympics-era infrastructure upgrades, and onboard monitoring systems were upgraded to facilitate predictive maintenance models influenced by demonstrations at Swiss Federal Railways-linked conferences and collaborations with Siemens-affiliated research.

Variants and Modifications

The N700A designation denotes the “A” upgrade applied to base N700 sets; modifications include retrofitted active suspension components, improved traction control, and cab equipment standardized with newer builds from Kawasaki Heavy Industries and Hitachi. Subclasses were modified over production runs to incorporate door systems and interior layouts reflecting passenger flow data from studies associated with JR Central customer surveys and adaptations used on long-run units similar to those deployed for Nozomi limited-stop services. Some sets received minor livery updates ahead of high-profile events such as Expo 2025 promotional services.

Maintenance and Upgrades

Maintenance regimes for the N700A integrate depot-level overhauls at facilities coordinated by JR Central and JR-West with components sourced through supply chains involving Nippon Sharyo and Kinki Sharyo. Scheduled inspections follow cycle regimes influenced by protocols from the Railway Technical Research Institute and are supported by condition-monitoring equipment supplied through collaborations with Fujitsu and NTT Data. Mid-life refurbishment plans address seating, passenger information systems, and energy-efficiency improvements comparable to refits performed on E657 series and other contemporary Japanese rolling stock.

Category:Shinkansen Category:High-speed trains of Japan