Kimetsu no Yaiba: Yuukaku-hen is currently airing. To give viewers the most comprehensive view of the anime's backdrop, here's a compiled article covering everything you need to know about the Red-Light District.
The Red-Light District can be loosely understood as an area that consolidates various adult entertainment services like adult stores, strip clubs, and adult cinemas. Here, prostitution activities often occur. Globally, some Red-Light Districts operate legally under government supervision. In Japan, a legal Red-Light District is referred to as 'akasen,' while illegal ones are called 'aosen.'

In Kimetsu no Yaiba, the Red-Light District is also known as the Conservatory Inn. This name originates from the term 'conservatory,' used to refer to ancient pleasure quarters. At the conservatory, Oiran - the Courtesans - serve guests while they enjoy food and drink.
Each conservatory is considered a 'house' and has its own name. Besides Oiran, these houses also have numerous attendants primarily responsible for household chores like washing and cooking. These attendants are often females who are orphaned, abandoned by parents, or sold off. Those with beauty are trained to become Oiran as they grow up.

The distinctive allure of the conservatory lies in the Oiran themselves. The more beautiful an Oiran, the more renowned her 'house' becomes. For this reason, proprietors are always on the lookout for beautiful girls, training and teaching them to dress attractively to captivate customers.
Oiran, besides fulfilling guests' sexual desires, possess additional skills. Depending on their talents, Oiran command different 'prices.' In comparison to ordinary yuujo, typical sex workers, Oiran undergo formal training. They can entertain clients with activities like calligraphy, flower arranging, tea ceremony, and musical performances on instruments like shamisen, shakuhachi, and tsuzumi. Before being attended to by an Oiran, customers must undergo impressive challenges set by them:
On their first visit to the establishment, patrons are sure not to meet the Oiran directly. Instead, they will summon a large entourage, showcasing their status and extravagant spending. At this point, one of the attending Oiran will sit at a distance to observe the customer's behavior. The second time, similar to the first, but now the Oiran will observe the customer from a closer position. Typically, patrons who wish to be attended by an Oiran visit the establishment frequently. On the third visit, the guest will be directly served by an Oiran. And naturally, at this point, the customer is expected to spend even more generously.
The most skilled Oiran are known as Tayuu (or Dayu), and they have the authority to refuse a customer's requests or decline to meet them if they wish. If 'purchased' by a customer (at an exorbitant price, of course), an Oiran can escape the life of a courtesan and become the woman of the buyer. Attempting to escape without being fully redeemed results in dire consequences if discovered.

By the end of the 19th century, Oiran gradually declined. Geisha, 'artists, not courtesans,' emerged as their replacements. Beautiful, talented Geisha, in line with the era, coupled with the introduction of laws against sex work, rendered Oiran obsolete.
As a manga for young adults, the Conservatory Inn in Kimetsu no Yaiba has been altered to appear 'brighter' than reality. We don't witness any sex work activities, and the Oiran primarily perform artistic skills to entertain guests, akin to the Geisha of the late 19th century.

Tanjiro, Inosuke, Zenitsu are disguised as females for easier acceptance into the 'houses.' As they cost almost nothing other than food expenses, the 'houses' readily accept additional attendants. If not trained to become Oiran, they serve as additional, unpaid labor, considering the children taken in as their 'assets.' Upper-Rank Demon Dabi represents the image of high-class Oiran, also known as Tayuu. These Oiran wield significant power, even making both hosts and patrons show deference.
Here's the essential information about the Conservatory Inn - the Red-Light District. With these foundational details, we'll have a more intriguing experience following Kimetsu no Yaiba: Yuukaku-hen - Demon Slayer: Conservatory Inn. Did you find the first episode captivating as it unfolds in the Red-Light District? Share your thoughts!
