Wow thanks for the info, Kuga!
15-19 Nov
I have too much stuffs to do at that time. Plus, I'm broke...
For anyone who's interested:
Seems like it's an event to celebrate the 40th Anniversary of JP - VN diplomatic relationship, held by Sun music.
According to google translate, it'll be a 4-day event.
It seems the document's made for ppl flying from Japan to VN for the concert, with info about hotels, tickets and booking in HCM city.
There should be more info about the concert(s), but I'll read it more carefully tomorrow. Too tired today...