
This is a photoshoot of Ami Kiyo for Graphis, unrelated to any sugar daddy/sugar baby arrangement.
Originally, I planned to reply directly to the comments, but the more I wrote, the more I realized I'd decided to create a separate post: How much does it cost to "sugar baby" an actress?
I interviewed an agent and had a long discussion with Nightshade, who has extensive experience in sugar daddies and considers herself a great negotiator (sorry, sister-in-law, I know you definitely won't see this). To make the article easy to understand, I've asked the sources to provide figures as much as possible. Everyone is welcome to discuss:
First, if you want to "sugar daddy" an actress, the first question you'll encounter is "how to do it?"—That's right, there are many ways to "sugar daddy," it just depends on how you want to do it. A cheaper way is to pay a sum of money to buy out her vagina. She can do whatever she wants, she can work, she can even work as a hostess, but she can't sleep with other people anymore.

This is a photoshoot of Ami Hiyo for Graphis, unrelated to sugar daddies.
How is this calculated? Generally, it's about 4 to 5 times the price of a single sexual encounter. That means if the actress earns 100,000 yen per encounter in the sex industry, you'd need to give her about 400,000 to 500,000 yen (20,000 to 25,000 RMB) per month. The two of you can have sex once a week. This kind of arrangement is relatively flexible; frankly, it's a fixed transaction without much emotional commitment. However, this kind of arrangement is prone to problems. Men are driven by sex, and the more their bodies heal, the easier it is for them to develop feelings. But this arrangement, which only covers sexual intercourse and not her living expenses, means you can't let any feelings get involved. However, it's easy to overstep the initial understanding between the two parties. You want to know everything about her – what she does for a living, who she goes out with, whether she has sex, etc. – making her annoyed and constantly suspicious of you… Unless the man gets tired of her and disappears without paying, this kind of sugar daddy arrangement usually ends up looking terrible. Those AV actresses are seasoned veterans; in the end, the clients who were supposedly head over heels in love are always disappointed…
Moreover, this kind of sugar daddy arrangement almost always limits the number of times you have sex (because the money isn't enough), so you can't actually have sex with her. Sad~
What if you provide everything?

This is a photoshoot of Asakura Kokona for Graphis, and it has nothing to do with being a sugar daddy/sugar baby.
This really requires careful consideration, because it's definitely not a small sum: just the "housing" aspect is a complex matter. Of course, you don't need to live in Meguro's mansion like Rimi Yuria (里美悠莉亚), where the rent would bankrupt many people. But finding a decent place for an actress to live would cost at least 1.5 million yen (75,000 RMB) a year. Then there are other expenses, depending on how you calculate them. You want her to be unable to work, unable to be petty and let you do whatever you want, unable to take care of herself and completely accepting your arrangements—according to agents, to pay such a price for actresses, even a well-known actress would likely cost at least 10 million yen (500,000 RMB). Then, adding the rent and other expenses mentioned earlier, it could reach 20 million yen (1 million RMB) a year.
And this is just for "well-known actresses." Top actresses in the industry earn far more than that, unless you're as handsome as a young Andy Lau and have a face that rivals Wu Zongxian's. She's incredibly good at bluffing; otherwise, if you offered that price to Yua Mikami or Arina Shin, you'd definitely be kicked out for not being sincere...
Of course, some might think that desperate actresses might accept very low prices, but let me remind you, the prerequisite for an actress to accept being kept is that she "won't starve." In Tokyo, where life is relatively comfortable, that's at least 250,000 yen per month (12,000 RMB). So unless you're talking about a group-buying price, don't think of actresses as cheap. You have to consider Tokyo's cost of living; no one will accept a price that would starve them.