your right, but it does price out cheaper starting from NRT then IST If you switch after initial search it comes up.

I'm seeing 1562 AZN (which is a little over 1000 Euro) but you need to start in NRT.

Business class

Flight: SU261 | SU2134

Depart: Narita International Airport, Tokyo, Japan (NRT)

Wed 11 May 12:00
Fare Basis ZBR
Business

Connection: Sheremetyevo International Airport, Moscow, Russia (SVO)

Wed 11 May 16:10

Wed 11 May 21:25
Fare Basis ZBR
Business

Arrive: Istanbul Ataturk Airport, Istanbul, Turkey (IST)

Thu 12 May 1:05

Arriving
view details
VALUE

Business class

Flight: SU2135 | SU260

Depart: Istanbul Ataturk Airport, Istanbul, Turkey (IST)

Mon 16 May 1:55
Fare Basis ZBR
Business

Connection: Sheremetyevo International Airport, Moscow, Russia (SVO)

Mon 16 May 5:20

Mon 16 May 19:00
Fare Basis ZBR
Business

Arrive: Narita International Airport, Tokyo, Japan (NRT)

Tue 17 May 10:35

Price Summary
Fare View

1403.95 AZN

Carrier imposed fees View

120.60 AZN

Taxes, Fees and Charges View

38.20 AZN

Discount
Fees

Total:
1562.75 AZN