Question 1

Where is Marugame Castle Second Front Gate?

Accepted Answer

Marugame Castle Second Front Gate is in Marugame, Kagawa, Japan. You can see its exact position from the map coordinates and the Street View link.

Question 2

Which scene of Yuki Yuna is a Hero does Marugame Castle Second Front Gate appear in?

Accepted Answer

Marugame Castle Second Front Gate appears in EP10 of Yuki Yuna is a Hero.

Question 3

Can I visit Marugame Castle Second Front Gate?

Accepted Answer

Yes. Marugame Castle Second Front Gate is a real place you can visit. Check what it looks like on Street View before you go.

Question 4

Where was Yuki Yuna is a Hero filmed?

Accepted Answer

Anime and manga are not filmed the way live action is. Their backgrounds are painted from photographs of real locations, and Marugame Castle Second Front Gate is one of those real places (EP10).