This is a bootleg cartridge of Nagagutsu o Haita Neko: Sekai Isshuu 80-nichi Daibouken  for the Famicom. This cartridge was designed by Whirlwind Manu and has the identification code LD20. The game contains chips. There is a sticker on the back of the cartridge.
 
One of the cartridge shell tabs is broken.
 
Everything is tested and works fine, as can be seen from the screenshots.