😈 Sakusei Kenkyujo (The Seed Extraction Lab) / Umeda
The Next Generation of “M-Seikan” has arrived like a comet, now reigning at the peak of the industry.
In an era where the “M-Seikan” (Masochistic Sensual Massage) scene is aging, we bring you a hybrid professional lineup of “Chijo” (Nympho/Succubus) therapists. They combine youthful energy with top-tier technical quality.
We also feature a roster of highly skilled veterans with refined techniques.
- Will you enjoy the next-gen therapists who have evolved rapidly by learning from the masters?
- Or will you be dominated by our hybrid succubi, where youthful innovation meets legendary ancient techniques?
The choice is yours.
🏛️ Store Information
Sakusei Kenkyujo (The Seed Extraction Lab)
- Service Type: Delivery Health (Femdom-style Massage / Umeda & Kitashinchi)
- Phone: 06-6366-8755
- Tip: Mention “I saw you on CityHeaven” for the best service!
- Hours: 24 Hours / Open Year-Round
- Dispatch Area: Umeda, Osaka [Details]
🔗 Official Links
- Official Website (PC): https://sakuseikenkyujo-umeda.com/
💡 Tips for English Speakers
- M-Seikan: This refers to a “Masochistic” massage experience where the female therapist takes a dominant role.
- Succubus/Chijo Experience: The term “Sakusei” literally means “Seed Extraction,” implying a highly intense, draining, and pleasurable experience.
Would you like me to create a short “How to Order” guide in English for international customers?
💎 Pricing System (Transparent & No Hidden Fees)
Our pricing is straightforward. We start the session immediately upon arrival, giving you an extra 15 minutes of value compared to other shops.
❖ Course Fees (Tax Included) ❖
| Duration | Effective Time* | Price (JPY) |
| 60 min | (Equivalent to 75 min) | ¥29,700 |
| 80 min | (Equivalent to 95 min) | ¥35,200 |
| 100 min | (Equivalent to 115 min) | ¥40,700 |
| 120 min | (Equivalent to 135 min) | ¥46,200 |
| 140 min | (Equivalent to 155 min) | ¥51,700 |
| 160 min | (Equivalent to 175 min) | ¥57,200 |
| 180 min | (Equivalent to 195 min) | ¥62,700 |
*We provide 15 extra minutes of value by starting the session immediately!
❖ Other Fees ❖
- Registration Fee: ¥1,100
- First-time Nomination: ¥1,000
- Returning Nomination: ¥2,000
- Special Nomination: FREE (Limited Time Offer!)
- Extension (30 min): ¥15,000
- Transportation Fee: ¥0 – ¥6,600 (Depending on area)
✅ Our Promise
- Transparent Pricing: You will never be charged more than the prices listed above.
- Credit Card Friendly: No credit card processing fees. All major cards accepted.
- Immediate Start: No wasted time—your experience begins the moment we meet.
We look forward to serving you!
📍 Dispatch Area & Service Details
【Shop Name】
Sakusei Kenkyujo (The Seed Extraction Lab)
【Operating Hours】
24 Hours / 7 Days a week
【Base Location】
Umeda, Osaka
【Contact Number】
06-6366-8755
【Available Service Locations】
We provide out-call services (delivery) to the following:
- Private Residences
- Love Hotels
- Business Hotels
🚕 Transportation Fees (One-way Travel Time)
Fees are calculated based on the travel time from our base in Umeda.
- FREE: Local/Immediate Area
- ¥1,100: Under 10 mins
- ¥2,200: 10+ mins
- ¥3,300: 20+ mins
- ¥4,400: 30+ mins
- ¥5,500: 40+ mins
- ¥6,600: 50+ mins
- Over 60 mins: Please inquire for a quote.
Note: Please feel free to ask our staff for the exact fee when you provide your location.
🔥 Service Menu & Options (All Included for FREE)
At the Seed Extraction Lab, the following “Core Play” is included in your course fee at no extra charge. Experience the ultimate domination.
【Standard Free Play】
The Finale: Seed Extraction Control (Total Bliss & Drainage)
Sensory Play: Eyemasks, Earplugs, Feather Touch
Breast & Nipple: Nipple Licking & Intense Stimulation
Body Service: Full-body “Lick Service” by the Chijo (Succubus)
Intimacy: Deep French Kissing, Dirty Talk (Femdom Style)
Oral Technique: Deep & Wet Fellatio, Ball Licking, 69 Position
Domination: Face Sitting (Face Riding)
Hand & Body: Handjob, Riding Sumata (Thigh-press), Mouth Ejaculation
Deep Stimulation: Prostate Massage / P-spot Stimulation
Scenario: “Gyaku-Yobai” (Surprise Night Visit/Ambush)
The Full Experience: All Nude service
Ultimate Release: Unlimited Ejaculations within the time limit
💡 Information for Visitors
- We are an Out-call (Delivery) service. Please provide your hotel name or address when booking.
Girls’ Review
Profile
Name: Kumi Kanzaki
Age: 32
Measurements: T147 / B83 (C) / W51 / H82
Questions for the Girl
Q: Special nomination fee (first time)?
A: Free for a limited time
Q: Special nomination fee (from second time onward)?
A: Free for a limited time
Q: Role/Job?
A: Nun
Q: What kind of male reactions excite you?
A: I get thrilled when I see someone craving me ♡♡
Q: What are you best at teasing?
A: Especially ears, nipples, penis, and anus 🤞
Q: What’s something a client said that made you happy?
A: “I’ll follow you, Kumi-sama” 🐶
Q: What kind of men turn you on?
A: I get excited when I hear them moaning with pleasure
Q: If the world were to end tomorrow, what would you do?
A: Something naughty 🤯
Q: What would you like to be called?
A: Kumi-chan, Kumi-san, or Kanzaki-chan
Q: Final message to customers?
A: Let’s go wild together 💪(`･ω･´)
Appeal Comment
Nice to meet you 🍌 My name is Kumi, and I’ve been working in M-themed sensual services for about 2 and a half years.
I can accommodate everything from soft teasing to hard play 🙆🏻♀️
For those new to this kind of service, those interested in anal play, or those who have had painful experiences in the past and feel anxious, I always aim to let you enjoy things at a comfortable pace 😊 Please relax and trust yourself to me 🍑
Now, let’s open the door to pleasure together 🫶🏻💗
Personal Options ⬇️
[Limited-time Free Options]
- One toy
- Strap-on
- Bondage
- Whip
(Please inform in advance if you want any of these)
¥1,000
- One toy (single type)
- Food play
- Chewing play (🍫 or 🍌)
¥2,000
4. All toys (anal, nipples, etc.)
5. Strap-on
6. Body fluid play
7. Single whip / multi-tail whip
8. Bondage (using hemp rope)
¥3,000
9. Simulated “golden” play (using jelly drink)
10. Fisting 👊
¥5,000
11. “Golden” play (same-day only)
¥10,000
12. “Golden” play (reservation required 2 days in advance)
Manager’s Comment
Simply put, she is a “professional.”
There is nothing she cannot do.
She will teach you everything.
To reach even greater heights, she attends training sessions with professionals from various fields several times a month, constantly improving her skills. Her dedication to pursuing male pleasure to the fullest is something you will understand once you meet her.
Her determination to master her craft until the very end—experience it for yourself. Her technique is truly authentic.
- Certified for perfectly painless pleasure in both soft and hard play
- Highly recommended even for beginners interested in anal play
by Extraction Research Institute Manager ❄️
Her exciting video
Personal Experience
⭐ 4.6
Looks: 4.5 Play: 5 Price: 4.5 Staff:4.5 Photos:4.5
“A Naturally Immersive Experience”
It was my first time trying this kind of service.
Starting with a gentle dom-style approach, the experience began with whispers and soft touches around my ears, gradually building a natural sense of tension and excitement. The careful oral techniques and the gradual increase in intensity felt very well-paced, making the entire flow smooth and reassuring, with a sense that the climax would be properly guided.
Compared to my previous experience, which was more intense and focused on endurance, this time I could fully relax and let go. It felt less about overwhelming stimulation and more about enjoying the sensations themselves, which left a strong impression.
Even towards the end, the pacing remained controlled, leaving a satisfying overall impression.
She maintained eye contact while gently leading the session, which left a good impression. She was also considerate of beginners, and the 60 minutes felt like they passed in no time.
The aftercare was polite and thoughtful, allowing me to leave feeling comfortable and satisfied.
If this review inspired you and you’d love to meet amazing companions like Kumi Kanzaki
, my consulting service for safe and enjoyable dating/escort experiences is a great place to start.
I’ll guide you through choosing the right venues and creating unforgettable moments — with safety, discretion, and fun in mind.
