A handmade birthday card that my son received from his friend

Hutte paper works ’s products are now on sale!
Thank you for wholesaling to me.
We have many of these in stock.
Washi Tape, Sticky Note, Memo Pad, Birthday Cards...
Please check out the "New Arrivals" section of our website !
https://papershopjapan.com/collections/hutte-paper-works

These birthday cards are made of natural white paper with simple foil stamping.
The envelopes are sweet and chic dark brown to match the image of a baked sponge cake😋
Sooo Cute!

This is a handmade birthday card that my son received from his friend.
Japanese children love "Ninja" and often make "shuriken" and swords out of origami.
"Shuriken" and swords are tools used by ninjas.
These are very well done!
Do you know japanese "Ninja" or "Shuriken" ?