This is a brand new puzzle manufactured by Epoch co in Japan.

Here are details from manufacturer:

• The “Demon Blade” is part of the pop-up puzzle decoration that can be decorated after assembling the puzzle. You can decorate the name of Neko Kanjiro Kagate, the younger sister of Charajiro, the protagonist character with this decorative film. Nezuko’s “Nezuko” is the correct representation of “Ne+I” (English language not guaranteed)
• The Japanese domestic movie performance proceeds over 401.3 billion yen (1st in history) as a present of July 4th. Enforcement proceeds worldwide, exceeding approximately 51.7 billion yen. In 2021, the new anime series “Yugaga” will be started
• (C) Koseharu Gotaki, Shueisha, Aniplex ufotable
• Material: Paper