Japkasai(Testicle massage),Karsai Nei Thang(Genital massage),Thai massage



This page is a summary about my store. For more details, please press the <Multilingual support> button and explore each page of JK’s website.


Providing ‘Comfort’ to Men

My establishment emphasizes the treatment environment and technical aspects that have not traditionally been given much importance in Japanese male therapist’s relaxation services for men.

Jap Kasai JK

I provide vitality and relaxation to men through Japkasai (testicle massage).

Certified in Japan and Thailand

I have obtained qualifications in Thai massage and Japkasai (testicle massage) in both Japan and Thailand.


Male Sexual Function Care

Caring for Male Sexual Function with Karsai Nei Tsang (Evolved from Japkasai (Testicle Massage)), Prostate Massage, and Lingam (Penis) Massage Techniques.


Thai massage

I blend Thai Massage with Dynamic Thai Massage, Herbal Ball Massage, and Tok Sen Based on your Preferences.


The Liberating Experience of Nude Massage Therapy

Please relax while lying spread out during my mat-based treatment.

※The practitioner will be clothed during the treatment.

A Clean Room with a View of a Small Garden


Little Services

-Fragrance-free soap and oil.
-Towels are ensured to be absorbent and clean through washing with sodium sesquicarbonate and drying with a gas dryer.
-Charging service available.
-Service to dry clothes in a dehumidifier during the treatment.
-No need for customer card registration.

Store Information

-My studio is located in Yotsuya, just 4 minutes by train from Shinjuku.

-“Business Hours (Blue Frame)

※ Courses that extend beyond 22:00 due to treatment duration (e.g., starting at 21:30 for 60 minutes) will be subject to a 1.5x surcharge as out-of-hours service.

About Me


Nice to meet you, I’m JK. I can only speak a little English, but I’ll manage somehow. For privacy reasons, I do not disclose my face. Choosing based on just this information is somewhat of a “bet,” isn’t it? I apologize. I strive to create an atmosphere where you can entrust both your mind and body to me so that you can enjoy the treatment in a relaxed state. I will do my best to make you feel like you’ve “won the bet.”