JR Hokkaido has announced it will build new 2-car 737 Series commuter EMUs to replace its aging KiHa 143 Series DMUs, which will also be the company's first commuter EMU designed for one-man operations. 13 sets will be built and operate on Muroran Main Line between Muroran and Tomakomai with the first set being delivered this winter and the rest will be delivered in 2023.
https://www.jrhokkaido.co.jp/CM/Info/press/pdf/220817_KO_737.pdf