Here's everything you need to know about the unmissable fixture.
When is Scotland v Japan?
Scotland face Japan on Sunday, October 13, just four days after Townsend's side's match-up with Russia.
The game kicks off at 11.45am BST.
Where can I watch or listen to it?
Those backing blue can either watch the game on STV or listen to the game on BBC Radio 5 live and 5 Live Sports Extra.
There will also be live text commentary on selected games on the BBC Sport app.
Where in Japan is the fixture and can I still get tickets for the match?
The Cherry Blossoms will be backed by a raucous home crowd at the Yokohama International Stadium.
Fans plotting a last minute trip to the Land of the Rising Sun can check availability of tickets at tickets.rugbyworldcup.com
John Barclay Simon BerghanFraser BrownScott CummingsAllan DellZander FagersonGrant GilchristJonny GrayStuart McInally (Captain)Willem Nel Gordon ReidJamie RitchieBlade ThomsonBen ToolisGeorge TurnerHamish WatsonRyan WilsonOn standby: Magnus Bradbury
Darcy GrahamChris HarrisAdam HastingsStuart HoggGeorge HornePete HorneSam JohnsonBlair KinghornGreig LaidlawSean MaitlandAli PriceFinn RussellTommy SeymourDuncan Taylor
Michael Leitch (Captain)Keita InagakiYusuke KizuJiwon KooIsileli NakajimaAsaeli ValuTakuya KitadeAtsushi SakateShota HorieLuke ThompsonWimpie van der WaltUwe HeluJames MooreHendrik TuiYoshitaka TokunagaPieter LabuschagneKazuki HimenoAmanaki Mafi
Kaito ShigenoFumiaki TanakaYutaka NagareYu TamuraRikiya MatsudaKenki FukuokaAtaata MoeakiolaLomano LemekiWilliam TupouRyoto NakamuraTimothy LafaeleKotaro MatsushimaRyohei Yamanaka.
Our Japan 2019 Rugby World Cup coverage is brought to you in association with Castle Water www.castlewater.co.uk and on Twitter @CastleWaterLtd