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Earth Cardboard Co., Ltd. Simple and easy to use! Introducing a new protective and reinforcing cardboard sheet for smart letters

Earth Cardboard Co., Ltd.
[Simple and easy to use! ] Introducing a new protective and
reinforcing cardboard sheet for smart letters
We are now selling creased cardboard that fits perfectly into Japan Post’s “Smart Letter”. Items useful for preventing folding of products and documents
Earth Cardboard Co., Ltd. (Headquarters: Ina-cho, Kitaadachi-gun, Saitama Prefecture, President and CEO: Toshimitsu Okuda) will begin selling cardboard products for smart letters as a new product.
[Image 1:×650.jpg] Earth Cardboard Co., Ltd. (Headquarters: Ina-cho, Kitaadachi-gun, Saitama Prefecture, Representative Director and President: Toshimitsu Okuda), which manufactures and sells packaging supplies centered on cardboard, will launch new products from Thursday, September 7, 2023. We have started selling “[Smart Letter] Pettanko Cardboard”. A folded cardboard sheet that fits perfectly in Japan Post’s “Smart Letter”. It is designed using 1.5mm (E/F) thick cardboard in a size exclusively for smart letters, so it is useful as a protective and reinforcing item when shipping A5 paper or postcard size postcards. In addition to Smart Letters, when mailing products and documents (using shipping methods such as Mercari mail, non-standard-sized mail, Nekopos, Click Post, etc.), we protect and reinforce the items so that the contents do not break. It can also be used by those who wish to do so.
The design is simple, just fold the cardboard sheet in half along the crease, making it easy for anyone to handle.
When the cardboard sheet itself is no longer needed, it can be sent for waste paper collection. This is an eco-friendly cardboard box that takes into account recent environmental issues such as plastic-free and SDGs.
▼ [Enter Smart Letter] Pettanko Cardboard Product Introduction Page:
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[Image 5:×1200.jpg] ■Product overview of “[Enter smart letter] Pettanko cardboard” Product ID: 1785
Product name: [Enter smart letter] Pettanko cardboard
Material: C120g
Thickness: E/F (1.5mm thickness)
Color: brown on both sides
Weight: 30g
Inner dimensions: 235 x 155 x 1mm
External dimensions: 235 x 155 x 3mm
Release date: Thursday, September 7, 2023
Own EC site price: Unit price starting from 24 yen (tax included) Own EC site: Contributing to users with high technological capabilities that have been cultivated since our founding
At Earth Cardboard Co., Ltd., we value the voice of our customers and contribute to the success of our customers’ businesses through the technology we have cultivated over many years since our founding. In order to support our customers who are promoting and considering SDGs, we are promoting initiatives with an eye on the future and next generation, and in recent years we have received awards from various organizations in recognition of our advanced IT initiatives. Ta. Earth Cardboard Co., Ltd. will continue to take on challenges with its advanced technology and ability to propose new value based on its pioneering spirit, as well as its trustworthiness gained through its early entry into the online mail order market and its proven track record, and will continue to contribute to society.
▼For those considering printing on cardboard boxes (information on full-color cardboard)
[Image 6:×730.jpg] [About Earth Cardboard Co., Ltd.]
Head Office: 7-17 Nishikobari, Ina-cho, Kitaadachi-gun, Saitama 362-0811 Representative: Representative Director and President Toshimitsu Okuda Established: March 1953 (Founded: March 1953)
Phone number: 048-728-9202 (main)
Business: Manufacture and sale of packaging supplies, mainly cardboard URL:
[Inquiries for the general public]
Company name: Earth Cardboard Co., Ltd.
Person in charge: Product Planning Manager Daisuke Okuda
Phone number: 048-728-9202
Earth Cardboard Official SNS
Press release video
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