Men Under T-Shirt


Regular price $45.00
Shipping calculated at checkout.


Dress shirts were originally undergarments, thus it is a rule in the West to not wear undershirt under a dress shirt. At Kamakura Shirts, we take it as an obligation to follow the rules of international standards, but the hot and humid summers of Japan recently are impossible.

For this reason, we accepted a challenge to develop a high-class undershirt that keeps shirts nice and clean even during the hottest and most humid days. This is not just an undershirt, but an undershirt designed by Kamakura Shirts, the dress shirt experts.
Our experts have integrated all the knowledge of shirt making to crafting an undershirt pattern.

The cutting around the neck is according to the button position of the shirt and the opening of the collar. Other things like durability, sleeves that reduce stress, adjustment of length, and addition of special deodorant process...
There is over 30 things that were considered in making this special undershirt.

One of the most particular things we considered was the color: beige and gray.
We recommend beige with white shirts and gray with blue shirts:
White & Beige to prevent transparency // Blue & Gray to prevent staining (e.g. sweating).

As for the material, if it is cotton 100%, it will take too long to dry and too thick.
We mixed polyester to get a lighter material and also the quick drying effect.
In order to feel as though you are wearing the shirt on your bare skin, the collar, hem, and cuffs are all seamless.

Cut-off ® (Gunze patented technology)
Water absorption, quick drying, and special deodorant processing

1. Sleeve Shape
The sleeves get narrower in order to reduce wobbling and discomfort.

2. V Line Design
In order to prevent the neck line from stretching, the seam is sewn on the inside.

3. Neckline matching the button position on the shirt
The neckline bottom position matches the position of the third button of a Kamakura Shirt.

4. Hem Cutting
The hem in the back uses a cutting technique that works together with the movements of the upper body to prevent it from climbing up.

  • Cotton 55%, Polyester 35%, Polyurethane 15%
  • Made in Japan

Read About Our Fabrics >
Find Your Size >

We are happy to refund any items provided that you submit a return claim within 14 days of received shipment. Make sure that return items are in new and unused condition, with tags attached.
Starting from August 1, 2023, any returns of 4 items or more will be subject to a USD 15 handling fee.
For more details →


Shipping Area Shipping Price & Time

Asia, United States

USD 25 (Customs Duties Included).

  • Est. 3 to 4 business days

Canada, Mexico, Central America,
Middle East, Oceania

USD 30 (Customs Duties Included)

  • Est. 5 to 6 business days

Europe, South America, Africa

USD 35 (Customs Duties Included)
Russia USD 40

  • EU: Est. 4 to 5 business days
  • Others: Est. 6 to 7 business days

We dispatch orders within 1-5 business days via DHL. Please note that shipping to Russia, Ukraine, Belarus, Iran, North Korea, and Israel are temporarily suspended.

*Please note:

  1. Currently, we cover import duties and taxes placed on your parcel.

  2. We sometimes separate orders to cut the cost and time of shipping. Please do not worry if you receive two tracking numbers.

  3. There may be a chance our shipping service does not ship to your country. Please contact us should you have questions.

  4. There may be a chance of delay of your delivery due to custom inspection.

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