Japan: Hokkaido cards in a cover

Today I got not only a postcard from Taiwan but also a cover from Japan.

Stamps:

Definitive (issued 1997)

Japanese Castles (two from set of five) (issued 10-12-2013)

The stamps show the Nijo Castle and the Hikone Castle.

Inside were two postcards from Hokkaido. Hokkaido is second largest Japanese island and also a prefecture. One of them shows windmills.

The other card is one of the popular Gotochi cards. The Gotochi cards are designed by the Japanese Postal System and they show Japanese symbols on a national and regional level in a brightly coloured and funny cartoon. "Gotochi" means "local". Every prefecture has some different cards.

Inside were also a smaller envelope with three stamps inside and...

... some pieces of original Origami paper.

Thank You very much Yuko!