I forget where on these boards, but people were speculating that there were two legs in Japan...
I personally believe different for two reasons:
a.) They've had a recent trend (S17 onwards) to have the penultimate leg held somewhere (relatively) close to the finale location, where they would have to travel a decent amount of distance from their previous location instead of having two legs in one city/country. This was the case in S17 (Hong Kong to South Korea, South Korea to L.A.), S18 (Switzerland to Brazil, Brazil to Miami), S19 (Belgium to Panama, Panama to Atlanta)
b.) They have never had two legs in Japan... EVER. S9 only had one leg, same with S12, S15, and S18. Even the international versions that went there have only spent one leg (TARA, TARI).
So, I think that the penultimate leg was in Osaka, and the leg before that was somewhere in South/Southeast Asia.