A place selling yukkuris as pets.
A yukkuri petshop will often cater to both type of humans, selling both pet care items (like food, toys, or clothes) and abuse items (like whips, torch lamps, or orange juice ampoules) all in the same shop.
As with animal patshops, yukkuri petshops tend to mostly sell koyukkuris as just like animals, it's usually easier to tame and train a yukkuri if you do it from a young age. Petshops tend to only keep a few adult yukkuris as breeding slaves or rarely to be sold as a "family package".
Because of that, pet koyukkuris being sold have an "expiration date". As a koyukkuri kept being unsold and grows older, their prices tend to get discounted cheaper and cheaper until the shop does a last ditch effort super cheap sale. If a yukkuri fails to be sold in said sale they will be removed using various means. Some shops turn them into livestock for predator pets, some sell them to factories where they'll be converted to food and stuff, and some just straight up kills them for fun.
The whole koyukkuri and expiration date stuff mostly applies only to common yukkuris such as Marisas and Reimus. Rarer breeds such as Sanaes will often be kept and sold even as they reach adulthood as they're rarer and higher in demand. Predator yukkuris such as Myons and Momijis are also often sold as adults as lots of people who buys predator yukkuris buys them for the sake of exterminating strays or house-yus and as such it's preferrable for them to be already an adult by the time they're bought.
Some petshops sells all kinds of yukkuris, not just pets. This includes compost yukkuris, livestock yukkuris for feeding predator pets, and cheap shitheads meant to be abused.
Some shops will also perform badge tests for owners or breeders who wants to upgrade the badge level of their pets, usually at an expensive price.