This is the original Japanese Hyakuninisshu karuta made by Tengudo, used for the official national competitive karuta tournaments in Japan.
These cards can be used for competitive karuta and for playing karuta for fun. Note that this set of cards are only the reading cards (yomifuda).
There are 100 reading cards in this box.
You can use the Wasuramochi reader app to practice how to read the reading cards for competitive karuta. You can also listen to the Hyakuninisshu readings for competitive karuta on spotify.
Tengudo is a traditional karuta maker situated in Kyoto, Japan. They have supported competitive karuta (kyogi karuta) as a way to play karuta and therefore have been the supplier for the national tournaments.