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In principle, we cannot accept cancellations or returns for pre-ordered orders.

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Artisan pattern maker by hand

eco package


Soft to the touch, stretchy for training, and an impressive dragon logo printed on the left arm. 100% cotton, using carefully selected extra-long cotton with a fiber length of 35 mm or more, it is characterized by its smooth texture and luster of the fiber. The dyeing process is more stretchy than before, achieving both an elegant firmness and comfort.

  • Reliable MADE IN JAPAN with a commitment to quality
  • The "Dragon" logo, which expresses strength, gives you power.
  • Comfortable material that is compatible with training
  • Standard style ideal for gym training

■ Product details

- material
(Body: 100% cotton)
- Made in Japan
- Model NO-STR-042

size Length Width shoulder width sleeve width Sleeve Length
M. 72.5 59 53 25.4 61
L. 74.5 62 56 26 62
XL 76.5 65 59 26.5 63

▼Reference size (in the case of height standard)
M : 160-170cm
L: 168-178cm
XL: 175-182cm

▼ Photo model: Alvaro wearing XL size
Height 178cm Chest 120cm Waist 80cm Inseam 75cm Weight 90kg


▼Hidemasa Yamagishi wearing XL size <br>Hidemasa Yamagishi Height 168cm

*In the case of elastic fabric, there may be errors in size.

Care instructions

*Please refrain from using a dryer as it may cause the print to peel off and the fabric to stretch.

・Avoid using bleach.
・Do not soak, do not soak for a long time or leave it wet.
・Use a net when washing, and after washing, adjust the shape before drying.
・Dye may transfer when washed with water, so wash separately from other items.
・Avoid ironing the printed part.

For accurate care instructions, please follow the precautions listed on the product's washing and quality label.

Find other products
We have created a long T-shirt that you can wear anytime, whether you gain weight or lose weight.

Loose long sleeves

STIMIRON's long T-shirt is an item for those who work on muscle training. It's a BIG FIT type, so it's loose. Made of soft and comfortable fabric, it is comfortable even when worn for a long time. Suitable for all seasons as it can be worn while increasing or decreasing weight. Please use this long T-shirt for a comfortable muscle training life.

100% cotton soft to the touch

This long-sleeved shirt is made of 100% cotton and features a gentle texture. It can be said that the comfort when touching the bare skin is exactly the high-quality feel. Especially for those who do muscle training, they often wear it for a long time, so materials that are gentle on the skin are essential. The more comfortable you are, the more effective your training will be. Experience the gentle texture of 100% cotton.

Comfortable to wear regardless of body shape

This long-sleeved shirt is designed to be suitable for periods of weight gain and weight loss. It provides a comfortable fit regardless of changes in body shape. It does not interfere with the movement necessary for training, and the soft and comfortable material makes it comfortable to wear for long periods of time.

The meaning behind the logo

The dragon's "dorsal fin" indicates Hidemasa Yamagishi's name and crown. The “horn” represents a desire to improve, and the overlapping “S” shape represents the overlap of STIM (stimulation), a coined word of STIMIRON. Like Hidemasa Yamagishi, I drew a dragon on his left arm.

"I think it's good to wear long sleeves that cover your arms more and more at the gym."

Lon tea for muscle training without tightening muscles

2 color variations

Beige - A calm impression that can be used for everyday wear.

Calm and calm. It has a natural color and is not flashy, giving it a simple and elegant impression. The color is easy to use not only for training but also for everyday wear.

Black - chic and mature color

A very popular color for training apparel, "black" gives a simple and stylish impression. The feature is that dirt and sweat are hard to stand out.

best dragon line for training

Dragon Series

March 2023. Hidemasa Yamagishi declared his return to the contest. We created a new apparel design line for HIDE YAMAGISHI, which competes in the world with the concept of "challenge" in the future.

Designing the strength of Hidemasa Yamagishi

Origin of dragon

Once called the Bruce Lee of the bodybuilding world, the dragon is now Hidemasa Yamagishi's trademark. As a new line of STIMIRON, we created the "Iron Dragon Logo" with the motif of the dragon that can be seen on the left arm.

STIMIRON's most important point when choosing fabrics

Pursued comfort

I was particular about comfort so that it would be easy to use for training. We wanted a comfortable fabric for dumbbell training, machine movement, and aerobic exercise.

what the dragon shows

Symbol of courage and challenging spirit

What STIMIRON's dragon series expresses is the "spirit of continuing to challenge" itself. The dragon, which is a symbol of strength, power and courage, is central to the design concept.