Goodbye to being skinny and scrawny.

One-on-one lessons! No enrollment fee! Completely private rooms!
Are you worried about being too thin? Do you have any of these concerns?
  • Clothes don't suit me, and my figure looks thin.
  • I want a more feminine/masculine figure.
  • I have a weak constitution and catch colds easily.
  • I can't gain weight easily, even when I eat.
  • I have a weak stomach and can't eat much.
  • I lack self-confidence and can't be proactive.
BASE is currently offering a free trial for first-time users.
Achieve your ideal body in the shortest time possible with BASE for!
Feel lighter all over your body with BASE for! Solve all your body-wide problems!
Build a body that defies age with BASE for!
Build a strong and flexible body to prepare for childbirth and childcare with BASE for
BASE for KIDS. During the summer when outdoor play is impossible, nurture your child's
A child's behavior that catches your attention might be the beginning of their talent.
Aim for a lean, muscular physique with BASE for!
Two pillars for creating a beautiful body
01
Strength training and body shaping[ To improve one's appearance ]
To create a beautiful physique, proper muscle training is essential. Strength training is not just about gaining weight; it's a crucial element in creating ideal body lines and achieving a healthy, toned physique.
To gain weight healthily, you need strength training and body shaping.
02
A nutritionally balanced diet[ Building a healthy body from the inside out ]
Diet is the fundamental foundation for creating a beautiful body. For those who are underweight, it's crucial not only to increase the amount of food they eat, but also to consider nutritional balance. With dietary guidance from a registered dietitian, we propose a personalized plan that is easy to follow, aiming for a body that shines from within.
To gain weight healthily, you need a balanced diet that includes muscle and nutrients.
お客様の声
BASE for Customer Feedback1
The dietary guidance was very helpful!
I was worried about being too thin, but I didn't know what or how to eat. BASE for's dietary guidance is specific and easy to incorporate into my routine. By combining it with strength training, I've gained weight healthily and feel energetic every day.
BASE for Customer Feedback2
I've finally gotten rid of my excessively thin physique!
I had always struggled with being too thin, but BASE for's weight gain program helped me get closer to my ideal body. In particular, having a trainer work alongside me gave me a sense of security and made it easier to stick with the program. I was able to gain weight in a healthy way, and I hope to maintain it going forward.
BASE for Customer Feedback3
I gained weight in a healthy way and it boosted my confidence!
I've always been self-conscious about being too thin, and it made me lack confidence. But with BASE for's weight gain program, I was able to increase my weight while building muscle. My physique changed, my posture improved, and I gained the confidence to stand in front of people.
BASE for Customer Feedback4
My posture has improved, and my body shape is more balanced!
Through the bulking program, I not only gained muscle mass, but my posture and body balance also improved. Previously, I was too thin and easily fatigued, but now I feel more energetic and my body moves more easily. I'm so glad I joined BASE for!
BASE for Customer Feedback5
My muscle mass has increased, and my body is now more agile!
When I heard "gaining weight," I imagined gaining fat, but BASE for offered a program that focused on building muscle. Thanks to them, not only did I gain weight, but my ability to move around easily in daily life also improved. I'm happy to feel my body changing in a healthy way!
No enrollment fee! Easy to get started!
At BASE for, we offer completely free membership to make dieting easier to start! We also use a ticket system, allowing you to train at your own pace. Even busy people can train comfortably according to their schedule.
Start easily without a long-term contract! Attend whenever you like! Pay only for what you use, so you can relax and enjoy!
We will propose a plan that suits you.
Personal training
No enrollment fee
or monthly fee.
Free trial session
(40 minutes)
50-minute course
1 time ticket 7,700 yen
4 time ticket
Expiration date: 6 months
26,400 yen 
6,600 yen (50 minutes) x 4 sessions
10 time ticket
Expiration date: 3 months
55,000 yen 
5,500 yen (50 minutes) x 10 sessions
80-minute course
1 time ticket 8,800 yen
4 time ticket
Expiration date: 6 months
42,000 yen 
10,500 yen (80 minutes) x 4 sessions
10 time ticket
Expiration date: 3 months
88,000 yen 
8,800 yen (80 minutes) x 10 sessions
*All prices include tax.
Stretching and bodywork
First-time trial
[50 minutes]
3,300 yen
First-time trial
[80 minutes]
5,500 yen
50-minute course
1 time ticket 8,800
4 time ticket
Expiration date: 6 months
30,800 yen 
7,700 yen (50 minutes) x 4 sessions
10 time ticket
Expiration date: 3 months
66,000 yen 
6,600 yen (50 minutes) x 10 sessions
80-minute course
1 time ticket 14,080 yen
4 time ticket
Expiration date: 6 months
49,280 yen 
12,320 yen (80 minutes) x 4 sessions
10 time ticket
Expiration date: 3 months
105,600 yen 
10,560 yen (80 minutes) x 10 sessions
Stretching and bodywork
extension option
10分 1,300 yen
*All prices include tax.
Private gym with
completely private rooms
Beautiful reception
Private rooms
FAQ
ANo, proper strength training is effective for increasing muscle mass and gaining weight in a healthy way. If you eat nutritious food after your workout, you can expect both weight gain and a toned physique at the same time.
AProlonged aerobic exercise can lead to weight loss, so keep it moderate. However, light exercise, such as a warm-up, improves blood flow and enhances the effects of training.
AConsidering your basal metabolic rate plus the calories burned through exercise, aim to consume more calories than you need. Eating small, frequent meals is effective.
AIdeally, you should do strength training two to three times a week. Maintaining a manageable pace is key to successful body building.
AYou'll start to notice changes in your body shape after continuing for about three months. While results vary from person to person, the most important thing is to continue at a comfortable pace.
AYes, you can. Our experienced trainers will create a beginner-friendly program and support you in progressing through your training safely.
AThere's no need to worry. Because women's muscles don't grow as easily due to hormonal influences, they can achieve a toned and flexible physique with appropriate training.
Continuing is important
Achieve an attractive physique in a healthy way.
There is absolutely no aggressive sales pressure.