How to Buy A5 Wagyu Online: A Buyer's Checklist
Oct 13, 2026
Buying Japanese A5 Wagyu online is a big purchase. A single steak can cost more than a nice dinner out, and "Wagyu" gets slapped on a lot of beef that is not the real thing. This checklist covers what to look for before you buy, what to expect when the box shows up and how to get the most out of every ounce.
First, what A5 means
A5 is the top grade from the Japanese Meat Grading Association. The "A" means the animal had the highest yield of usable meat. The "5" means it scored top marks for marbling, color, texture and fat quality. For marbling specifically, A5 beef lands between 8 and 12 on the 12 point Beef Marbling Standard (BMS). For the full breakdown, see A5 vs Australian Wagyu.
The A5 buyer's checklist
1. It should say "Japanese" and "A5"
A5 is a Japanese grade. Only beef raised and graded in Japan can carry it. If you see "American Wagyu A5" or "Australian A5," that is a red flag. Those can be excellent steaks, but they are graded on different scales.
2. Ask about the certificate and the 10 digit ID
Every animal in Japan gets a 10 digit individual identification number at birth. It follows the beef all the way to the grade, so you can trace a steak back to the animal it came from. Good sellers can tell you the grade and provide documentation on request. If a seller cannot tell you where the beef came from or how it was graded, keep shopping.
3. Know the prefecture
Japanese Wagyu is often sold by the prefecture where it was raised, and each region has its own reputation. Our lineup comes from four:
- Miyazaki: one of Japan's most decorated Wagyu regions, known for rich, even marbling. Try the Miyazaki A5 ribeye.
- Kagoshima: Japan's largest Wagyu producing prefecture, known for a clean, sweet finish. Try the Kagoshima A5 filet mignon.
- Hokkaido: our Hokkaido A5 is snow aged, stored in cold, humid snow rooms to deepen the flavor. Try the snow aged A5 skewers.
- Gunma: sold as Shimofuri "Frost" beef. Shimofuri is the Japanese word for marbling, and this beef earns the name.
What about Kobe? Kobe is a brand from Hyogo Prefecture with its own rules. Not every A5 steak is Kobe, and not every Kobe steak is A5. A5 from Miyazaki or Kagoshima can be every bit as good.
4. Pick the right cut for how you will eat it
- Ribeye: the richest and most marbled. Best for sharing.
- NY strip: a little firmer with a strip of fat along the edge. A great first A5.
- Filet mignon: the most tender and the least fatty. Good for people who worry A5 will be too rich.
- Block cuts and skewers: pre-portioned for searing in cubes. The easiest way to try A5 on a budget.
5. Buy the right amount
A5 is far richer than any steak you have had. Plan on 3 to 4 ounces per person, or about 2 ounces if it is one course in a bigger meal. A 14 oz ribeye feeds three or four people as a tasting.
6. Check how it ships
A5 should arrive frozen solid, vacuum sealed and packed in an insulated box. Look for a seller that ships early in the week so your order is not sitting in a warehouse over the weekend. Ours ship frozen from St. Louis by 2-day air, Monday to Thursday (order by 3 pm Central to ship the same day), with free shipping on orders over $299.
7. Sanity check the price
Real A5 is expensive because of how it is raised, graded and imported. If a "Japanese A5" ribeye is priced like a USDA Prime ribeye, ask a lot of questions before you buy.
When your A5 arrives
- Put it straight in the freezer if you are not cooking it within a few days.
- Thaw it in the fridge, still sealed, for about 24 hours. Never thaw it on the counter or in the microwave.
- Cook it within 3 to 4 days of thawing.
How to cook A5 Wagyu
- Pull it from the fridge 20 to 30 minutes before cooking.
- Cut it into 1 inch cubes or slices about half an inch thick. Smaller pieces render better and are easier to share.
- Heat a cast iron pan until it is ripping hot. Do not add oil. Render a small piece of the fat in the pan instead.
- Sear for 30 to 60 seconds per side, until you get a deep crust. A5 cooks fast.
- Finish with a pinch of flaky salt. Wasabi or a little soy sauce on the side is traditional. Skip the steak sauce.
FAQ
Is A5 Wagyu the same as Kobe beef?
No. A5 is a grade. Kobe is a brand from one prefecture. Some Kobe is A5, and plenty of A5 is not Kobe.
Can I refreeze A5 Wagyu?
It is best not to. Thaw only what you plan to cook in the next few days.
What is the best A5 cut for a first timer?
A NY strip or a block cut. Both are easy to portion and give you the full A5 experience without committing to a giant ribeye.
How do I know my A5 is authentic?
Buy from a seller that names the prefecture and the grade and can back it up with documentation. Every animal in Japan is traceable through its 10 digit ID number.
Ready to try it? Shop all Certified Japanese A5 Wagyu, or start smaller with a sampler from Boxes and Samplers.
