The process of making the Japanese musical instrument "Shamisen"! 

Der zweite ist für eine Tsugaru-Shamisen. Die ist in der Tat moderner und hat eine dickere Haut.

for me it’s by the strength of this glue! don't tell me it's rice glue

Obviously they were made from animals sinews and guts.

The strings of the shamisen have been made of silk since ancient times, and surprisingly, they have not changed even now. There was no time when animal intestines were used. (Although the thin strings of Tsugaru shamisen are nylon)

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My thought it's a sort of animal gelatin, like fish or rabbit skin glue that's ground into a powdered form, ready for activation upon hydrating? I could be wrong, though.

Don’t quote me on this, but I think that it might be made from rice. Even when it’s not used for glue, it is very sticky.

Yes, it’s a rice based glue. Very common in Asia.

They only use skins of dogs that committed suicide. (Wikipedia)

На его создание ушло две жизни милых кошечек... На каждую поверхность идёт одна шкурка!

Most of them are dog skin. Cats are expensive. There are also goat, kangaroo, and artificial leather. Animal skins are imported from outside Japan.

젖꼭지가 없으므로 개의 가죽입니다.

looks to be starch glue. Just rice starch and water. Common in Asia and used on paper machete and other crafts.