Akadama - Japanese Hard Bonsai Akadama

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Akadama (red ball) is a volcanic byproduct mined exclusively in Japan. It is in some ways similar to clay, but with a unique microscopic structure that makes it ideal for bonsai use. Akadama is excellent as a component in bonsai soil as it retains nutrients. It also allows roots to grow through it and breaks down over time. Akadama is a key component in nearly all quality bonsai soils.
The shipping process will break down some of the Akadama so it will need to be sifted prior to use. The fines in Akadama restrict aeration within bonsai soil so need to be removed prior to repotting. The fines can be saved and mixed with sphagnum moss and sphagnum peat moss to create muck which is commonly used in forest plantings.

We supply a variety of brands including Kobayashi, Kotobuki, Double Line, Soukaka (Double Crane), Kato Sangyo and Ibaraki.  In my opinion they all seem to be of equal quality.  We generally don't have them all in stock, but due to limited supply from Japan we usually take what we can get.

Akadama Grain Sizes Available:
2mm or 2.5mm - Extra Small Size - @ 1/32" - 1/8" - For Very Small Trees (Shohin, Mame)
5mm - Small - Standard Bonsai Use @ 1/16" - 1/4" - The Most Common Size
7mm - Medium - Most pieces @ 1/4" and 1/2" - Many Use It For Larger Trees and          Some Pines.  I use it as part of my drainage layer and for some pines.

Akadama Bag Sizes Available:
13 Liters - A full Japanese bag of Kobayashi  About 3.44 Gallons
14 Liters - A full Japanese Bag of Double Line, Kotabuki, or Ibaraki - About 3.7 Gallons

All of these brands are very similar in terms of hardness when completely dry.  We strive to import the hardest Akadama available to the United States. 

This is a hard quality Akadama imported from Japan.

  • Akadama is a semi-hard substance that can be crushed in your hand.  It is softer when wet and harder when dry.  When dry it is nearly as hard as rock.
  • Perfect for adding to your own bonsai mix
  • This product will need to be sifted prior to use to remove any fines that accumulate from the shipping process.  Normally fines 1/32" or smaller are less than 5% in the 5mm bags.  Fines can be used to make muck. Wear a mask for safety.
  • Prior to shipping from japan this product was sieved to be the appropriate size.

Customer Reviews

Based on 14 reviews
Dennis Coad (Harvest, US)
Still in the bag

Looks good thru the bag

Jack Ward (Washington, US)

Fines not terrible but still significant. About 2/3rd of a 24 once coffee can.

William Mayhall (Idabel, US)

Great product

Sam Bixler (Perry, US)
Good size

Good value

Joe Jacovino (Phoenixville, US)
Happy to Get It!

Hard to get akadama of this size and quality. Looking forward to reporting this Spring!


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Thank you for your purchase. We hope you are happy with your items! However, if you are not completely satisfied with your purchase for any reason, you may return it to us for a full refund, store credit, or an exchange. Please see below for more information on our return policy.


All returns* must be postmarked within thirty (30) days of the purchase date. With the exception of returns for broken/damaged items, all returned items must be in new and unused condition, with all original tags and labels attached.

*Plants + Trees Returns: By purchasing a tree from us, we assume you know how to properly care for the tree. Bonsai and other plants are alive and will die if not properly cared for. We have no control over how trees are cared for once in your possession. Therefore, by purchasing this tree, you acknowledge that we, the seller, provide no warranties expressed or implied after the tree is delivered. This tree is sold "AS IS" and this sale is considered final. No refunds or exchanges will be offered after the tree is purchased. We will only ship healthy trees. We will require a signature on most trees over $100USD. If the box arrives damaged, please take pictures and make note with the shipping company prior to signing. If you sign for the package, the sale is final.


For the easiest way to process returns purchased through our website, please visit: https://returns.richcommerce.co/return/new?c=superflybonsai

For items purchased through Etsy, please include the item and invoice # and return to:
Superfly Bonsai
1670 S. Cameron Street
Harrisburg, PA 17104

For items purchased through Amazon, Walmart, or eBay, please visit the vendors website. Linked below is information from each vendor to get you started.
Amazon: click here
Walmart: click here
eBay: click here

Please note, you will be responsible for all return shipping charges.* We strongly recommend that you use a trackable method to mail your return.

*Certain returns may be eligible for shipping charge reimbursement. We reserve the right to refuse refunds on shipping charges based on reasons for return.


Once we receive your item, we will inspect the condition of the items and notify you that we have received your return. We will also notify you on the status of your refund after we've inspected the item.

If your return is approved, we will initiate a refund to your original method of payment. You will receive the credit within a few business days, depending on your card issuer's policies.


If you have any questions concerning our return policy, please contact us at:

*Management reserves the right to refuse a refund, exchange or the resale of any item based on the condition of the merchandise.

Shipping Policy

Order Processing

All orders are processed within 2 to 3 business days (excluding weekends and holidays) after receiving your order confirmation email. You will receive another notification when your order has shipped.

Plants + Trees Shipping: Shipping may be delayed to prevent the tree from sitting in a warehouse over a weekend or holiday. Most trees ship Monday-Wednesday. We do not ship trees to PO, FPO, or APO boxes. We also do not ship trees out of the continental US or to California.

Domestic Shipping Rates and Estimates

For calculated shipping rates: All orders (under $99 USD or Wholesale) will be presented with shipping options that are calculated based on the item weight, box size, and distance from our shipping location.  We currently only use Fedex.
Free Shipping: All RETAIL orders over $99.00 USD ship free within the continental USA. Free shipping will be the lowest cost option from FedEx.

In-Store Pickup

You can skip the shipping fees with free local pickup at our warehouse. We are located at:
1670 S. Cameron Street
Harrisburg, PA 17104

We will send you an email when your order is ready along with instructions.
Our in-store pickup hours are 10AM-4PM Monday-Friday. Please have your order confirmation email with you when you come.

International Shipping

At this time*, we do not offer international shipping.
*Shipping to Canada and Mexico will be available at some point in the near future. Check back for updates to this section.

How do I Check the Status of my Order?

When your order has shipped, you will receive an email notification from us which will include a tracking number you can use to check its status. Please allow 48 hours for the tracking information to become available.
If you haven’t received your order within a reasonable amount of time, please contact us at support@email.com with your name and order number, and we will look into it for you.

Shipping to P.O. Boxes

FedEx: FedEx will only ship to P.O. Boxes with SmartPost, which we do not offer at this time. Click here for more information.

Refunds, Returns, and Exchanges

We accept returns that are postmarked within thirty (30) days of the purchase date. With the exception of returns for broken/damaged items, all returned items must be in new and unused condition, with all original tags and labels attached.
In the event that your order arrives damaged in any way, please email us as soon as possible at superflyservice@superflybonsai.com with your order number and a photo of the item’s condition. We address these on a case-by-case basis but will try our best to work towards a satisfactory solution.
If you have any further questions, please don't hesitate to contact us at superflyservice@superflybonsai.com.

Large Orders

If you are a placing a larger order (over 30 bags of soil or many pots), it may be cheaper to ship via freight truck. If you are interested in pricing for this, please contact us here.

Show Pickup & The Superfly Express

We attend 7-10 shows a year (if not cancelled), mostly on the east coast. Please check our calendar to see if we may be attending a show close to your location, and we can arrange to bring your order for pickup at the show.  No minimum.

We started the Superfly Express shortly after the Covid-19 pandemic started.  We did this as a way to get products to wholesale customers with no shipping fee.  We basically will deliver your order on one of our trips to your area for free if the order is over $1000 and you are close to our route.  We will also deliver retail customers orders over $1000 if they don't want to utilizer our free shipping for whatever reason.  We currently only travel east of the Mississippi river and have 4 routes.
1.  New York/New England Area
2.  Ohio/Michigan/Illinois/Indiana Area
3.  Western virginia & NC/Tennessee/Alabama/Mississippi/Kentucky
4.  Maryland/Eastern Virginia & NC/SC/Georgia/Florida

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