721 series
# 721 series

The 721 series (721系) is an AC electric multiple unit (EMU) operated by Hokkaido Railway Company (JR Hokkaido) on Sapporo area suburban services in Hokkaido, Japan since 1988.

## Design

The trains were built jointly by Hitachi, JR Hokkaido (Naebo Factory), Kawasaki Heavy Industries, and Tokyu Car (Yokohama).

## Fleet

As of 1 April 2012, the fleet consists of 135 vehicles, formed as 23 3-car sets and 11 6-car sets.

## Variants

* 721-0 series
* 721-1000 series
* 721-2000 series
* 721-3000 series
* 721-4000 series
* 721-5000 series
