The show dates for the 2019 (37th) ‘Tokyo International Audio Show’ (TIAS for short):
Friday 22nd November 10.00 – 19.00
Saturday 23rd November 10.00 – 19.00
Sunday 24th November 10.00 – 17.00
The show is held at the ‘Tokyo International Forum’, located in Yurakucho, Tokyo.
Here is the website link in English and Japanese: Link.