







☕ Elevate your coffee game with Japan’s iconic flash brew!
Suntory’s Rainbow Mountain Blend is Japan’s top canned coffee, delivering a smooth, light roast espresso doubleshot in a convenient 6oz can. Sourced from seven Guatemalan regions and flash brewed for freshness, it offers 110mg of natural caffeine and a creamy, gluten-free formula—ready to energize your busy lifestyle with authentic Japanese coffee culture.









| ASIN | B08L4KNBV6 |
| Age Range Description | 18+ |
| Allergen Information | Milk |
| Best Sellers Rank | #93,847 in Grocery & Gourmet Food ( See Top 100 in Grocery & Gourmet Food ) #81 in Ready to Drink Liquid Coffee |
| Brand | BOSS |
| Brand Name | BOSS |
| Caffeine Content Description | Caffeinated |
| Caffeine Content Per Serving | 110 milligrams |
| Certificate Type | JPPS |
| Coffee Blend Name | Rainbow Mountain Blend |
| Coffee Roast Level | Light Roast |
| Coffee Type | Prepared Coffee Drink |
| Container Type | Can |
| Country as Labeled | Japan |
| Customer Reviews | 4.6 out of 5 stars 1,125 Reviews |
| Diet Type | Gluten Free |
| Flavor | Coffee with milk and sugar |
| Item Dimensions | 2.08 x 2.08 x 4.13 inches |
| Item Form | Liquid |
| Item Package Weight | 2.77 kg |
| Item Type Name | Canned Coffee |
| Item Volume | 2128.8 ml |
| Item Weight | 6.08 ounces |
| Liquid Contents Description | Coffee |
| Manufacturer | Suntory B&F N.A. |
| Number of Items | 12 |
| Package Information | Can |
| Region of Origin | Japan |
| Roast Level | Light Roast |
| Size | 6 Fl Oz (Pack of 12) |
| Special Ingredients | Milk, Sugar |
| Specialty | Flash Brew |
| Sweetness Description | sweet |
| UPC | 088857019949 |
| Unit Count | 72 Fluid Ounces |
| Variety | Rainbow Mountain Blend |
P**U
Delish! Worth Every Penny, No Doubt!
Not quite as pristine as the black but still so yummy. They call it BOSS for good reason… it leads head and shoulders above the rest! Slightly smokey, clean and smooth. Perfect pick me up treat in the afternoon. I regret nothing!
D**D
Refilled my HEAT gauge.
Bought this as a fan of Yakuza, got made a fan of BOSS coffee. Genuinely, insanely good coffee that beats the hell out of Starbucks RTD's which by my estimation, are far more concerned with sugar than coffee. 110mg of caffeine per can means you're getting a kick without blowing your heart valves and the modest size means you can easily put down a can in its entirety in a sitting, as well as it being convenient for travel. I wish this was cheaper or more readily available, I would drink this regularly if I could.
M**N
Wow. Where do I even begin?
Let me take you back to October of 2017. I had made my first trip to the wonderful land of Japan and nestled in among the good people who live there. During my stop in Kyushu, I ran across this BOSS Rainbow Mountain Blend coffee at an AEON Mall. At the behest of my friend who I was staying with at the time, I bought some to consume on the spot. It was already chilled, and as soon as the coffee hit my taste buds, I was in for a real treat. I was sure to buy up some more to take home with me on the flight back to America. Don't let the 6 oz size fool you. These little coffees pack a wallop and the taste is phenomenal. Even though I'm not one to get cream or sugar in my coffee (as Brian Griffin says, I like mine black as sin), the combo of everything feels just right. The quality of the roast is quite solid. Consisting of slightly woody notes, with not a sign of burnt flavor, this should appease any coffee snob anywhere. I'm so glad Suntory finally came to their senses and started properly importing this stateside for our enjoyment. The price is certainly higher than your typical Starbucks brew, but this really is a unique experience, almost a rite of passage that everyone should go through, and a good taste of what the Japanese like to call quality coffee. This beverage gets my seal of approval. Even if you find the price a bit too high, I'd still consider getting one case for the novelty factor and, who knows, maybe you'll get hooked? :)
J**B
Great Flavor. Shipping Damage.
It’s awesome to finally try one of Japan’s greatest vending machine drinks. The flavor is nice and it offers that nice Kick of caffeine. The cans however did arrive with a numerous amount of dents and dings. The can has a strong thick build of aluminum so it was still fine. I would just would have preferred it to not have these damages. The price is understandable do to being imported. However, I do find it difficult to spend $30 for 12 small cans. Overall, if the price was eventually reduced, and the shipping damage was fixed, I would gladly purchase again. It’s a nice once in a while treat to buy, especially as a gift.
B**O
Rainbow Mountain Blend, the apex of Japanese canned coffee culture.
In Japan, people are always on the go; which is why Japan is a country that heavily strives for convenience. Canned Coffee was invented in the 1950’s for exactly that purpose. A quick pick me up, in a can, on the go. Originally conceived by UCC, Suntory absolutely perfected RTD (Ready-To-Drink) canned Coffee in the 90’s with their BOSS brand, and with it, the signature ‘Rainbow Mountain Blend’. What separates Rainbow Mountain from the rest, is its undeniable balance, and uncompromising depth of flavor. Not too sweet, not too bitter, small can, but a sizable caffeine dose. Rainbow Mountain has been notorious coveted by aficionado’s here in the States for several reasons. For one thing, prominence of Japanese culture has been on the rise for more than a decade, which means some curiosity likely stemmed from the fantastically entertaining ‘Alien Jones’ Japanese TV spots featuring the product in Japan (which I highly recommend as a quick but satisfying internet search). Secondly, the product was incredibly difficult to get ahold of before Suntory decided to bring it over. I for one am truly delighted that Suntory graced us with this absolute gem of a product. The BOSS brand has an indelible mantra surrounding it, that embodies the work life culture in Japan. People work hard to be their absolute best, and coffee is a staple that helps empower them. Suntory has applied that ideology into making a superior coffee product that leaves the consumer feeling as though they’re ‘The Boss’. That’s why BOSS Coffee will always be my #1.
B**R
Intensity and flavor
As my title states, this coffee has an intense yet balanced flavor. I enjoy the caffeine strength
O**A
My favorite canned coffee drink.
Fantastic coffee! The world would be a better place if this were more widely available and in every flavor like in Japan. Great pick me up. Delicious flavor. Great hot, cold, or room temp. Japan spoiled me with these and now I'm obsessed.
D**G
Make sure you drink it cold
Absolutely freaking DELICIOSO coffee!!! MAKE SURE YOU DRINK IT COLD!!! Totally different taste cold than room temp
Trustpilot
2 weeks ago
2 weeks ago