Whoosh, the first High-speed train in Indonesia and South-east Asia, currently operating in Jakarta and Bandung with maximum speed of 350km/h

The distance between Jakarta and Bandung are about 143km and Whoosh can travel between them for only around 45 minutes.

There is also a plan to extend this to go to Surabaya through Yogyakarta, but this isn't clear yet.

Image taken from Wikimedia: https://commons.wikimedia.org/wiki/File:Whoosh_High-speed_Train,_from_Halim_to_Tegalluar,_Over_Kopo.jpg#/media/File:Whoosh_High-speed_Train,_from_Halim_to_Tegalluar,_Over_Kopo.jpg