Welcome to the Boulder Boys Klub

Boulder Boys Klub (BBK) is a community of climbers (not just boys) who are members of our premium indoor rock-climbing gym. It is a small, friendly space in which our staff members strive to assist climbers of any level of experience, from beginners to advanced. Our knowledge is not only limited to indoors rock climbing, but includes the outdoors as well, both in Japanese and basic English!
The basic climbing routes were made by 8611inc, Miyazawa Katsuaki, and Hori Tsukuru, among others.

BBK is located in Musashikosugi which has great access from Yokohama and Tokyo as it’s only 10 min from Shinagawa Station. Come in and join us for a climb today!

Opening Hours

Opening Hours

Tue – Friday 13:00〜23:00
Saturday 11:00〜22:00
Sunday, Holidays 10:00〜22:00

※Under 13 years old : weekdays open〜18:00, weekends open〜14:00.
※Under 16 years old : daily open〜21:00.
※Kids Workshop Wednesday : 15:30〜17:45 Thursday : 16:30〜18:45 Saturday: 10:00〜11:00
※First-time climbers should avoid practice during our kids workshop hours, please contact us for details.



Please register for BBK on your first visit.

※Taxes are all included

First time registration ¥1,300


Adult Student Ages 6-13
Whole day (Weekday) ¥1,800 ¥1,600 ¥1,300
2 Hours (Weekday) ¥1,400 ¥1,100 ¥1,000
Whole day (Weekend, Holiday) ¥2,000 ¥1,700 ¥1,400
After 18:00 (Weekend, Holiday) ¥1,600 ¥1,400 N/A


Adult Student Ages 6-13
¥12,100 ¥8,800 ¥6,600

※Under-15 climbers must be accompanied by an adult.
※Under-18 climbers required parental permission form.
※Student ID is required for student pricing.


11-DAY PASSES ¥19,000

※Come in any time.
※11-day passes are valid for 6 months.
※11-day passes can be shared with other BBK members.


Chalk ¥350
Liquid Chalk ¥250
Shoes ¥350
Clothes (S/M/L) ¥350

Location and Contact

Address / Tel.

1F Daiko Building, 2-chōme−1325-1 Kamimarukosannōchō, Nakahara Ward, Kawasaki-shi, Kanagawa
Tel: 044-789-5528


9 min walk from south exit of JR Musashikosugi station
8 min walk from Tokyu Toyoko line Shinmaruko station
6 min walk from JR Nambu line Mukaigawara Station

※Bike parking area is limited.
※We do not have a car parking area, please use public parking.

Musashi-kosugi transit