The attackers then took her bag and fled.
Emergency responders and police arrived at the scene soon afterwards.
The woman was taken by ambulance to the hospital while still conscious, and doctors said her injuries were not life-threatening.
Police are treating the case at this stage as “attempted murder during a robbery”.
However, investigators are also looking into whether the attack may not have been random, with sources saying the suspects and the victim could have known each other or had some form of connection.
No such relationship has been officially confirmed.
After the incident, police sealed off part of the Abechika underground walkway as forensic officers checked physical evidence, including blood traces, footprints, possible escape routes and CCTV footage from around Tennoji Station.
AloJapan.com