Another Keio 9000 Series at Chitose-Karasuyama Railroad Crossing No.4 in January 2023: 6

In February 2025, Keio announced that ten-car 9000 series would be renewed (no update is planned for eight-car 9000 series). The renewal process is expected to proceed at a rate of about two trains per year, so it will likely take around 10 years to update all twenty trains.

Done