 When the extension reached the Kanda River, a temporary subway station was opened at Manseibashi on January 1, 1930.This station was closed again on November 21, 1931 since the line had been extended across the Kanda River to Kanda Station itself.The old subway station is currently (as of 2007) still closed as a station, but the opening remains as a ventilation shaft, emergency exit and maintenance access point for the metro line.