Visit Japan Web Codeshare Flight Question

Hi everyone,

I’m currently filling out the "Register Planned Entry" on Visit Japan Web, and I’m a bit stuck on the flight information section for a codeshare flight.

• Booking: Booked through Air Canada.
• Route: Vancouver (YVR) to Tokyo (HND).
• Flight Number on my receipt: AC6249.
• Operating Airline: The flight is physically operated by ANA (All Nippon Airways).

The form says: "For codeshare flights, please enter the main airline company name."

From some searching, I've found that the ANA number: NH115 should be the same flight.

However, on my receipts, the Air Canada website, and the ANA website, it is all listed as AC6249, and nowhere is the ANA number.

Which would be the main airline and flight number I should enter?

I really appreciate any help, as this is my first codeshare flight.