This is the Savoia S21 Seaplane from the 1992 Japanese Animated Adventure Film Porco Rosso.
The film was written and directed by Hayao Miyazaki. The story is based on an Italian World War I ex-fighter ace, Porco Rosso, now living as a freelance bounty hunter chasing air pirates in the Adriatic Sea. After being cursed, he was transformed into an anthropomorphic pig.
Below is a link to Wikipedia.
The kit is by FineMolds and is in 1/48th scale. The seaplane and trolley were painted with Tamiya Acrylics. The panel lines on the seaplane are black gouache, and the beaching trolley was grained using a brown gouache.
The figure is not the same scale as the seaplane (1/48th), being nearer 1/35th scale.
He was painted the same as the rest of the model.
I've included a couple of photos showing the internal detail, which includes the guns and fuel tank.
13 additional images. Click to enlarge.