¥ 30,800 Tax included
Updated, Proprietary Fabric
At only 380 grams*, our MINI is the most versatile backpack in our product line with a maximum capacity of 32 liters, suitable for both one-day and overnight hiking. Designed to allocate the load naturally in the upper part of your torso, MINI frees your waist to ensure comfort while walking the rugged mountains of Japan.
From 2022, the front pocket and bottom of the MINI are made of our new BLACK UHPE Fine Grid, a proprietary fabric that uses 200 denier high-density nylon with extremely tough ultra-high molecular weight polyethylene ripstop fiber** woven at 2mm intervals. Of all the fabrics we use for our backpacks, it is the most tear-resistant yet super light and strong.
To keep the MINI light, only the front surface has been treated with a C6 durable water-repellent, whereas the back is not coated. Use a pack liner or waterproof stuff sack to keep your items inside dry. Being non-coated means that the fabric is highly resistant to deterioration from hydrolysis and general use.
*Size M, excluding accessories.
***Also known by trade names such as Dyneema or Spectra. It is an ultra-high molecular weight polyethylene material that is extremely strong and lightweight.
Updates of the 2022 MINI
The front pocket and bottom of the MINI are updated from the X-Pac VX07 to the new BLACK UHPE, which is much stronger and durable but lacks water resistance. The front pocket zipper is changed from the water repellent one to the coil zipper for better durability and smoother opening/closing.
The inside of the front pocket and the main compartment are white for better visibility of the items.
Made in Tokyo, Japan
Size M 25-30L / 1525-1830 cu in
Size L 28-32L / 1708-1952 cu in
Size M 380g (Without Accessories)
Size L 398g (Without Accessories)
Body: 70D HT PC Coated Ripstop Nylon 106g/㎡
Front Pocket: Black UHPE Fine Grid 128g/㎡
Side Pocket: Lycra Twill 226g/㎡
Bottom: Black UHPE Fine Grid 128g/㎡
Back Panel: 3D Mesh / 200D HT PC Coated Oxford Nylon 144g/㎡
Zipper: YKK #5 Coil Zipper
Minimalist Pad (45x90x0.5cm/43g)
Reflectable Bungee Cord
UNISEX | M / L
Product Story 1
Akira Natsume, Yamatomichi Founder
I designed the MINI, Yamatomichi’s second backpack, to be as simple, lightweight, and easy-to-use as possible.
Inspired by the classic Ray-Way backpack, by Ultra Light Hiking pioneer Ray Jardine, our MINI is designed to carry the main load on the shoulders only leaving your waist comfortably free. If the load is properly distributed in the upper areas around your shoulder blades and chest, most people will have no problems comfortably carrying up to 8 kilograms without using the waist for support. This frees your waist and allows for free and more comfortable movement when hiking.
Many conventional small to midsized backpacks have thin and flimsy shoulder straps, causing too much stress on the hikers’ shoulders. These packs are not properly designed to distribute the load around the chest equally, although they might be lightweight. On the contrary, MINI’s shoulder straps are designed to avoid the load to concentrate on the shoulders even with a heavy load. I tested numerous different strap designs to find the optimum hardness and thickness of the straps.
If you try it on, I am sure you will feel the firm and comfortable shoulder pads effortlessly distributing the load throughout the whole upper body around the shoulder blades and your chest. While the MINI is designed to carry up to eight kilograms comfortably, I believe that the pack can hold even up to ten kilograms while avoiding too much stress on the shoulders.
Unlike many typical ultralight packs with iconic mesh front pockets, MINI is equipped with the zippered front pocket made of X-Pac for the Japanese rainy climate. The pocket is not completely waterproof but highly water-resistant with a water repellent zipper, keeping the items inside dry in light rain.
The MINI holds about 25 liters in volume, but will expand to about 30 liters due to the spacious roll-top should you need to carry a tarp of light shelter for an overnight hike or even longer with proper planning and equipment selection.
So that’s why I believe that the MINI is our most versatile backpack in the Yamatomichi lineup. I use it anywhere from a stroll around my hometown to snow hiking and will keep testing and improving the backpack along the way.
Product Story 2
Akira Natsume, Yamatomichi Founder
It has been more than five years since we started the development of our proprietary BLACK UHPE, and more than seven years if we go back to the point when we learned about Honeywell, the American company that made the Spectra yarn used in the UHPE fiber. We eventually manufactured the fabric in Taiwan, and all in these years, we experienced how difficult and time-consuming it can be to develop a proprietary fabric. Let me share the story.
The BLACK UHPE is not the only fabric that we developed by ourselves: “100% Merino” and “70 Denier HT PC Coated Ripstop Nylon” are proprietary and it took quite a long time to complete any of these. There are always challenges in the production and even after completion and we are very grateful to the companies who have supported us in our journey towards even better fabrics.
Even Lighter, Stronger
We initiated the development of BLACK UHPE with a study of the toughest weave structure. We analyzed many sample fabrics to define the best method to make a strong, durable, yet lightweight fabric.
After repeated trials, we concluded that the simple, plain-weave, and fine-grid ripstop structure makes the fabric strong. Then, how thick or fine the yarn should be? Is it 50 or 70 deniers? Perhaps 100? How about 200 deniers?
Generally, the lower a denier count is, the lighter a fabric will be. Yes, the fabric became lighter to a certain degree by lowering the denier count, but it was not a dramatic weight reduction. On the other hand, our test showed that the fabrics with a lower denier count showed a marked decrease in strength. After repeated prototyping and testing, we defined that 200D provided an outstanding balance of lightness and strength.
Plant-based Bio-polycarbonate Material
We initially tried a hydrolysis-resistant polycarbonate coating and applied it to the backside of the fabric. The coating is usually made from polyurethane, which tends to be hydrolyzed and decomposed within approximately 10 years, which is a backpack’s virtual lifetime. Therefore, we needed a hydrolysis-resistant polycarbonate material.
Our idea was to adopt the plant-based bio-polycarbonate coating, but it turned out to be unsuccessful at first because UHPE was so heat-sensitive that the general coating method at high temperatures resulted in the melting of the fabric. On the other hand, it was technically impossible to apply the high-quality coating at low temperatures.
How can we properly coat the UHPE? We, together with the coating agent maker, discussed countless times with the Taiwanese fabric manufacturer. The backside coating was a tough issue and took us two years to reach the sad conclusion. The fabric manufacturer’s answer, unfortunately, was that the coating cannot be technically applied on the fine, 2mm grid UHPE ripstop fabric. According to what they said, the coating on a 4mm grid, instead of 2mm, was possible because 4mm was wide enough for the coating to be applied. We were very depressed by this conclusion but had to come up with the next move: non-coated material.
Before this coating issue became apparent, the purpose of the coating was to enhance the water-resistance of the backpack, which at least was our understanding. However, as many hikers experienced, even if the fabric is coated, when rainy, it tends to absorb water, and the entire backpack gets wet, thus the items inside become moist. We thought that if the items inside get wet by rain with or without the coating, the coating is not essential if not meaningless. Additionally, the coating can cause the weight gain of the fabric, which means that the weight can be lighter if the fabric is uncoated.
However, the meaning of the coating was much more profound than we thought.
Why do fabrics have coatings? Our test showed that without coating, the edges of the cut fabric are likely to be frayed. A backpack made of non-coated fabric usually develops frays at the stitches, and eventually, the whole backpack breaks down.
Then, how can we make a backpack with non-coated fabric? Our answer was to use a laser cutter to cut the fabric. By cutting the non-coated UHPE fabric with a laser, the edges melt and harden, preventing frays.
Proprietary Water/Oil Repellent Coating
We eventually had to give up the water-resistant coating on the back after many trials and errors as described above, but the surface water/oil repellent coating was so crucial in outdoor activities where stain resistance is necessary that we had to continue the development. The proprietary surface coating, however, was equally a challenging issue because it also requires a high temperature when applied, which may damage the fabric.
We searched the global leading companies of the oil/water repellent, one of which turned out to be Daikin in Japan, the major air conditioner company. We contacted them and got to know a good person in charge, who helped us develop the water/oil repellent that can be applied at low temperatures. In the mass-production process, problems occurred, and each time we solved them. It took us about a year to complete the development of the water/oil repellent for our specific needs.
From the initiation of development to mass production, it took a lot of time and effort. Now, we are happy to announce that our proprietary BLACK UHPE is finally ready.
Form and Function
Carry the Load
The MINI is built to hold up to around eight kilograms of pack weight (total weight including food, water, gear, etc.) and comfortably distribute the weight in the upper body area around the shoulder blades and chest without relying on waist support.
The MINI’s design thus frees your waist from the load and ensures comfortable hiking around the rugged Japanese mountains.
The MINI has a long roll top with a total capacity of over 30 liters in size M, and 32 liters in L. You can be creative and use the top strap, bungee cords and bottom attachment loops to carry even more.
Anatomy of MINI
Integrated Minimalist Pad
We have included a Minimalist Pad (H45cm x W90cm x D0.5cm / 43g) in the back of the MINI. The Minimalist Pad is removable and can be used as a sleeping pad or an emergency pad to keep you warm.
How to Carry
Please make sure to position the MINI as high as possible in the upper part of your back.
It is designed to carry up to approximately 8kg total weight. The shoulder straps are designed to comfortably distribute the load in the upper part of your torso. By shouldering the MINI in this way, you will carry the backpack entirely using the upper part of your torso comfortably. If you intend to use MINI for fastpacking or running, an accessory hip belt can be attached. Please note that the hip belt is solely for better stability, not for load distribution to your waist.
We offer a number of options to expand the features and capacity of your MINI.
The MINI uses the 70D HT PC Coated Ripstop Nylon for the main body, and BLACK UHPE Fine Grid for the front pocket and bottom; both fabrics are proprietary.
BLACK UHPE Fine Grid
The new BLACK UHPE Fine Grid is our proprietary fabric that uses robust 200 denier high-tenacity nylon with extremely tough and light ultra-high molecular weight polyethylene (UHPE or UHMWPE) fiber* woven at 2mm intervals as a ripstop.
Of all the fabrics we use for our backpacks, it is the most tear-resistant yet super light and strong.
To keep the MINI light, only the BLACK UHPE’s front surface has only been treated with a durable water-repellent treatment, whereas the backside is not coated. Use a pack liner or waterproof stuff sack to keep your items inside dry. Being non-coated means that the fabric is highly resistant to deterioration from hydrolysis and general use.
*The UHPE fiber is made of an ultra-high molecular weight polyethylene material with excellent strength and lightness. The Dyneema and Spectra are made of the same UHPE fiber and generally conceived as white, but we adopted the black yarn.
The laser cutter makes it fray-proof by melting and hardening the cut edges.
Material: 200 Denier Ultra High Molecular Weight Polyethylene (UHPE) Fiber, 200 Denier High-tenacity Nylon
Coating: C6 DWR (Durable Water Repellent)
In-house test results*:
- Tensile strength (JIS L1096A): 180kg (vertical), 160kg (horizontal)
- Tear strength (JIS L1096A): 20kg (vertical), 17kg (horizontal)
*Variations may occur according to the actual production lot.
70D HT PC Coated Ripstop Nylon
This 70 denier HT (high-tenacity) ripstop nylon fabric is our proprietary material with enhanced strength and durability compared with conventional nylon. The surface is DWR (durable water repellent) finished, and the backside is polycarbonate coated, achieving a much better anti-hydrolyzation performance than regular polyurethane-based fabrics. The results of the Tropical Test, aka Jungle Test, in which the fabrics are left in a machine with 95% humidity, temperatures at 70°C for ten weeks, showed that the new material will not significantly deteriorate for 10 years.
Material: 70 Denier High-tenacity Nylon, Polycarbonate Coating, DWR (Durable Water Repellent)
In-house test results*:
- Tensile strength (JIS L1096A): 97kg (Vertical), 64kg (Horizontal)
- Tear strength (JIS L 1096D): 7kg (Vertical), 4kg (Horizontal)
- Water pressure resistance (JIS L1092B): 4079mm
*Variations may occur according to the actual production lot.
Comparison Chart of Fabrics
The blue number shows the weight (gram per square meter), and the black number indicates the tear strength (kilogram). Overall, the BLACK UHPE is lightweight but has excellent strength.
For larger hikers, we have added the Size L since 2019, now offering the Size M and L with different torso lengths and shoulder strap shapes.
|体重 / Weight
|身長 / Height
|背面長 / Back Length
In general, we recommend the larger L if you are over 175cm tall, but as all people are different we recommend you try out the two different sizes before you buy if at all possible.
- The length of the shoulder strap is the straight line from the base of the strap to the end of the core material.
- Please measure your torso length according to our measurement. Please refer to ONE製品ページ for details.
Is the MINI water-resistant?A.
The MINI is not water-resistant. Though a rain cover can be effective to protect from the rain, it is not completely water-resistant. For better water resistance, we highly recommend the water-resistant pack liner or the Ziploc to keep your items away from the rain.
Is it suitable for daily use?A.
Some customers do use the MINI for towns, but please note that it is not designed for daily use. The long roll-top are made large to maximize the volume, so you might find them too much at the supermarket.
The MINI is, however, so lightweight and well-balanced that it is comfortable even in towns. You may be able to carry heavy groceries without a problem!
- Hand-wash only. Do not machine wash.
- Submerge the product in lukewarm water with a correct amount of neutral detergent, and hand-wash it.
- Do not bleach. Do not use fabric softener.
- Remove any optional parts such as pads before washing.
- Wash off any noticeable stains or smudges with a washing brush or soft sponge.
- Rinse well so that no detergent remains.
- Drain the backpack with the mouth down. Keep dry in a shade.
- Store in a dark, well-ventilated place.
- Do not iron.
- Hand-wash the pad gently, rinse well and keep dry in a shade.
- We only accept payment by credit card. We currently do not accept payment via bank transfer from overseas accounts.
- We accept the following Credit Cards: Visa, Master, American Express, and JCB.
- To download your receipt, please click the link included in the Dispatch Notice, which we will send by email as soon as the items are dispatched.
We will ship by DHL for overseas customers (excluding China, Hong Kong, Taiwan, Korea and Russia). For customers in China, Hong Kong, Taiwan, Korea and Russia, we will ship by EMS only. Shipping costs vary depending on your country and region.
- Overseas customers who need to change the size of their order, should note that the time needed for shipping will vary greatly depending on your country of residence.
- We only accept exchanges when the item is unused (except for fitting).
- If you wish to exchange the size of the item, please contact us within seven days of receiving your order.
- Exchanges can only be made for the same color in a different size.
- If the size you wish is out of stock, we will suggest a different color.
- If the product is out of stock, we may simply have to ship the item back to you.
- All shipping costs to be carried by the customer.
- We will only send the exchanged item to you, upon receipt of return shipping cost via PayPal.
- Please be aware that some countries charge customs duties depending on the price of the item.
- We are unable to answer any questions on local customs. Please contact your local customs bureau.
We accept repairs for all of our Yamatomichi products. For inquiries on repair services including patching the holes, repairing with extra components, or fixing the items damaged over time, please feel free to contact us from the “Repair” section of the SUPPORT page.
- For temporary repair, please keep the repair tape in your emergency kit.
- The repair tape should be patched up on both the front and back sides of the fabric. The tape must be larger than the damaged or torn part of the fabric.
- If you round the edges of the patch, it will last longer.