An Overview of the New "Konenoko Bin 420" Mail Service | Key Points for Optimizing Shipping Costs

Yamato Transport’s flat-rate delivery service “Koneko Bin 420,” announced in the spring of 2025, is attracting a lot of attention.

This service is a new type of lightweight, small-package delivery service targeting everyone from individual users to small e-commerce businesses, and it is an ideal choice for sample shipments and returns processing.

Additionally, for users of "Hubbuyer," a service that handles the import of goods from China on their behalf, Koneko Bin is a highly compatible service that can be utilized for domestic reshipping and returns within Japan.

In this article, we will explain the features of "Koneko Bin 420" in detail and introduce specific ways Hubbuyer users can utilize it, along with the benefits it offers.

Pricing and Size Limits

Flat rate of 420 yen nationwide, including all packaging materials and shipping costs

As the name suggests, "Koneko Bin 420" offers a simple and easy-to-understand pricing structure with a flat rate of 420 yen nationwide.

This fee covers all shipping materials and postage, with absolutely no additional costs.

The packaging used is a dedicated paper envelope-style package provided by Yamato Transport. As long as the item fits within a thickness of 3 cm, it can accommodate a wide range of items, including clothing, miscellaneous goods, accessories, and documents.

Details on Maximum Size, Weight, and Coverage

The size limits are as follows:

・Thickness: Up to 3 cm

・Weight: No limit

・Total of three sides: 60 cm or less (estimated)

Regarding Insurance and Tracking:

・Includes a tracking number and supports anonymous shipping

・Insurance: None (※Not suitable for shipping high-value items or precision equipment)

As such, while "Koneko Bin 420" offers tracking, it does not include insurance, making it ideal for shipping relatively inexpensive items, as well as for returns and resending samples.

Delivery Method and Speed

A major advantage of "Koneko Bin 420" is that, despite being a drop-off service, it delivers nationwide at speeds comparable to Yamato Transport's Takkyubin service.

Delivery takes place as early as the next day after shipment, and no later than two days, making it suitable for use as an express service.

Furthermore, because it includes a tracking feature, e-commerce businesses can accurately notify customers that items have been shipped, which helps improve reliability in customer service.

Service Coverage and Important Notes

Shipping Methods

"Koneko Bin 420" can be shipped using the following methods:

・Drop-off at a Yamato Transport branch

・Requesting pickup at your home or office (*Available via the Yamato Transport app or by phone)

Locations Where Shipping Is Not Available

Please note that we do not support shipping from the following locations:

・Convenience stores (Seven-Eleven, FamilyMart, etc.)

・Parcel lockers (PUDO Stations, etc.)

In this regard, it may feel slightly less convenient compared to services like Nekopos or Yu-Packet, which allow shipping from convenience stores.

However, since we offer home pickup, it can actually be quite convenient for businesses shipping larger quantities.

Important Notes on Filling Out Forms and Waybills

With Koneko Bin 420, the packaging materials and shipping label are integrated, so there is no need to prepare a separate shipping label.

Please write the following information directly on the front of the envelope by hand.

・Recipient information

・Sender information

・Item Name

You may also use a homemade address label with the recipient’s name printed on it, provided it meets the following conditions:

・The label must be sized so that it does not extend beyond the thick orange border on the envelope

・Text must be printed in a size large enough to be legible during shipping

*Please note that shipping labels printed using shipping label generation tools, such as Yamato Transport’s “B2 Cloud,” cannot be used.

*Please note that we do not support shipments from Okinawa Prefecture.

Specific Use Cases

For shipping slightly heavy items

While many standard mail services have a weight limit of “1 kg or less,”

"Koneko Bin 420" has no such restriction.

Therefore, as long as the item fits within the mail service size limits, you can ship items weighing over 1 kg.

Compared to using standard courier services, shipping costs are roughly half, leading to significant cost savings.

For shipping product samples and catalogs

It is ideal for sending new product announcements, samples for buyers, and promotional catalogs.

Since you can expect significant cost savings when continuously sending lightweight, flat items to business partners, it is a strong ally for regular sales activities.

For shipping small items via flea market apps

Koneko Bin 420 is also very convenient for transactions on flea market apps like Mercari and Rakuma.

It supports anonymous shipping with tracking numbers, making it a shipping method that gives buyers peace of mind.

It is suitable for shipping compact items such as accessories, stationery, and small appliances.

"Koneko Bin 420" is a domestic shipping service that works exceptionally well with Chinese import support services like Hubbuyer.

You can expect the following benefits from using this service, particularly in the following situations:

Ideal for shipping small items and prototypes

Koneko Bin 420 is highly effective for test sales or distributing samples of miscellaneous goods, accessories, and prototypes sourced from China within Japan.

With a flat rate of 420 yen nationwide, including packaging and shipping costs, its excellent cost-performance allows you to significantly reduce shipping costs for promotional activities.

In this way, "Koneko Bin 420" is a highly practical option for Hubbuyer users as a means of optimizing last-mile delivery costs within Japan.

Comparison with Other Services (Nekopos, Yu-Packet, etc.)

"Koneko Bin 420" is a new option with unique features among small-package delivery services.

Let’s compare it with other major delivery services to see how it differs.

● Koneko Bin 420

・Price: 420 yen (includes all packaging and shipping costs)

・Thickness limit: Up to 3 cm

・Insurance: None (Not recommended for high-value items)

・Shipping locations: Drop-off at Yamato sales offices or home pickup (*Cannot be shipped from convenience stores)

・Tracking: Available (Anonymous shipping supported)

●Nekopos (Yamato Transport)

・Fee: Up to 385 yen (varies depending on packaging materials and contract terms)

・Thickness Limit: Up to 2.5 cm

・Insurance: Available (up to 3,000 yen)

・Shipping Locations: Convenience stores, service offices, and other locations nationwide

・Tracking: Available (can also be used on Mercari, Yahoo! Auctions, etc.)

● Yu-Packet (Japan Post)

・Fee: Up to 360 yen (varies by size and weight)

・Thickness Limit: Up to 3 cm

・Insurance: None

・Shipping Locations: Wide range of options, including post offices, Lawson stores, and drop-off boxes

・Tracking: Available

Comparison Summary

As described above, Koneko Bin 420 is extremely user-friendly thanks to its “materials included,” “flat-rate pricing,” and “home pickup” features. With clear shipping costs per shipment, it is well-suited for business use.

In particular, it is expected to be a highly cost-effective shipping option for scenarios such as handling returns, sending samples, and test marketing.

Future Outlook and Points to Note

While "Koneko Bin 420" is a very user-friendly delivery service, there are currently some limitations.

For example, the accepted size is limited to "up to 3 cm in thickness," and coverage is capped at 3,000 yen.

[Points to Note When Using the Service]

・Not suitable for shipping high-value items (due to low coverage)

・Special packaging materials must be ordered in advance (requires preparation at a service office, etc.)

・Not available for shipping from convenience stores (only available at service offices or via home pickup)

Provided you understand these points, "Koneko Bin 420" is a highly effective, low-cost, and efficient shipping method.

It is particularly effective for repeated use under specific conditions, such as returns or promotional shipments.

"Koneko Bin 420" is a simple yet highly cost-effective small-package delivery service that offers a flat rate of 420 yen, including packaging materials and tracking.

It is highly practical for everyday, low-risk shipping tasks such as distributing samples and shipping small items.

It will also serve as a valuable tool for users sourcing products from China through Hubbuyer, enabling smooth after-sales support and reshipments following domestic sales.

Whether you’re just starting an e-commerce business or are already using Hubbuyer, incorporating Koneko Bin 420 can help you review your logistics costs and improve operational efficiency.

We encourage you to make the most of this new delivery service in your daily business operations.