😈 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: Kazuha Shiina
Age: 24
Measurements: T161 / 83 (C) / 51 / 82
Questions for the Girl
Q: Special nomination fee (first time)
A: Free for a limited time
Q: Special nomination fee (after second visit)
A: Free for a limited time
Q: What kind of reactions from men excite you?
A: When they try to hold it in
Q: What are you best at teasing?
A: Nipples
Q: What’s something a man said that made you happy?
A: “I’ve never felt anything like this before”
Q: What kind of men turn you on?
A: Men who feel a lot and show it
Q: If the world were ending tomorrow, what would you do?
A: Meet the people I want to see
Q: What would you like to be called?
A: “Kazuha-san”
Q: Lastly, a message to customers!
A: Feel it to your heart’s content 🫶
Appeal Comment
Nice to meet you, I’m Kazuha.
I’ve always loved being the one in control…
The look on your face when you tremble with pleasure is my greatest reward.
I’m honestly not sure which emojis to use in situations like this, so I’d really appreciate your help.
I’m looking forward to meeting you.
Manager’s Comment
She has a visual level you simply won’t encounter in everyday life.
Without a doubt, she’s “SSS rank”‼︎
Her appearances are rare and unpredictable, which only adds to the excitement—you never know when you’ll get to see her next. She shows up a few times a month, and we truly want as many M-type gentlemen as possible to experience this level of satisfaction.
We are fully confident that her overwhelmingly beautiful appearance, combined with her occasional cute gestures, will earn top marks from anyone. Even if you’re too nervous to call because she’s “too beautiful,” we encourage you to take that first step and make the call.
Reservations will definitely fill up quickly, so we recommend booking as early as possible. It’s easy to imagine a future where she’s constantly fully booked due to her popularity.
She is honestly stunning beyond belief. She mentioned she’s not used to taking photos and seemed a bit flustered while trying to write her photo diary—that kind of natural charm is something customers will surely find adorable as well (^^).
You can expect someone who is 1,000 times more beautiful than her photos. We are confident that everyone will be more than satisfied.
— Extraction Research Institute, Manager ❄️
Her exciting video
Personal Experience
⭐ 5
Looks: 5 Play: 5 Price: 5 Staff: 5 Photos: 5
“A Goddess-like Beauty”
Honestly, I was speechless the moment she entered the room.
She had a radiant, elegant beauty, and her posture was impeccable. Calling her simply “cute” or “beautiful” doesn’t do her justice—she’s on a completely different level. No matter the angle, she looked stunning, and I was honestly captivated the entire time. I feel like I lost some of my memory because I was so mesmerized (lol).
Just having someone this beautiful kindly interact with me was enough to make my heart overflow with happiness. Her natural sense of distance and every gesture she made left a strong impression. To be honest, I was so overwhelmed that I can barely remember the finer details.
There were moments when I wondered if I might be too inexperienced for her, but she never showed any discomfort and treated me gently and sincerely throughout. From beginning to end, I felt completely at ease. I’m truly grateful.
If this review inspired you and you’d love to meet amazing companions like Kazuha Shiina
, 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.
