The aging Sanyo Shinkansen Line will undergo major renovations from 2028, the line's operator said Wednesday. The work on bridges, tunnels and embankments will take a decade.

West Japan Railway Co., known as JR West, estimates the total cost at ¥155.7 billion, part of which will be financed through reserves set aside from April.

The line began life in 1972, with services between Shin-Osaka and Okayama stations. It was extended westward to Hakata Station in Fukuoka Prefecture three years later.

JR West submitted the renovation plan to the transport ministry on Wednesday.