Introducing " Kutchan -Oji," a rare and exceptional potato from Kutchan Town , a major potato-producing area, made using "special cultivation" methods and aged for 540 days at low temperatures. This ultra-premium potato, with its rich, sweet flavor and depth reminiscent of a dessert, is not available on the general market.
Kutchan , a gift from the land nurtured at the foot of Mount Yotei in Hokkaido .

Kutchan Town , located at the foot of Mount Yotei in Hokkaido , is known as a world-class ski resort. However, it is actually one of the leading potato-producing areas in Hokkaido, boasting a long history and considerable scale.
In early summer, vast fields stretch as far as the eye can see at the Susono of Mount Yotei . Every year from late June to mid-July, white and purple potato flowers bloom in full glory, becoming a beloved seasonal spectacle that beautifully adorns Kutchan Town. Currently, approximately 1,200 hectares (equivalent to about 256 Tokyo Domes) of farmland in the town are cultivated, and every year large quantities of high-quality potatoes are shipped nationwide.
" Kutchan Potatoes," delivered from Kutchan Town , are a regional brand filled with the thoughts of the people, the bounty of the land, and the pride of the town. They are carefully cultivated under unified standards using special cultivation methods that limit the use of pesticides and chemical fertilizers to a certain amount, and the entire production area continues its efforts to deliver safe, secure, and delicious food.
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Table of Contents
- "540" is a premium product born from a vast production area, and is not available on the general market.
- 540 days of rest, powered by the wisdom of our ancestors. The mechanism of Kutchan "540"
- Why isn't it available to the general public? Reasons why it's limited to partner restaurants.
- [ Kutchan/ Niseko Area] Main Partner Restaurants Where You Can Eat "Goyon"
- summary
"540" is a premium product born from a vast production area, and is not available on the general market.
It is precisely because Kutchan Town is such a major production area that it can produce a premium product that is rarely found in the general market. That product is the ultra-long-aged potato "Gon-yon-maru".
Carefully selected, high-quality potatoes are placed in a dedicated storage facility and left to rest for approximately 1.5 years (540 days) in the low-temperature environment unique to snowy regions. Through this slow and gradual maturation process, the starch is converted to sugar to its maximum extent, transforming them into a miraculous flavor with a rich sweetness reminiscent of a dessert and a mellow depth of flavor reminiscent of nuts.
Despite being produced in a region known for mass production and mass shipping, "Goyon" is crafted with the utmost care and effort, making it a rare treat that can only be enjoyed by a select few chefs and in select restaurants. Please savor the supreme sweetness spun from the bounty of the majestic Mount Yotei and the passage of many years.
540 days of rest, powered by the wisdom of our ancestors. The mechanism of Kutchan "540"

The most distinctive feature of "Goyon" is its long maturation period of "540 days," which lasts for about a year and a half from harvest.
| item | Detailed specifications |
| raw materials | " Kutchan " are grown in the rich natural environment at the foot of Mount Yotei in Hokkaido , under strict temperature control. |
| Storage method | Snow storage, utilizing the wisdom of our ancestors. |
| Aging environment | Maintain temperature fluctuations as little as possible, and after storage, allow the items to rest gently without being moved. |
| Aging period | 540 days (approximately 1.5 years) |
| Changes in taste | The saccharification of starch during long-term storage increases sweetness and creates a deep, rich flavor. |
Why isn't it available to the general public? Reasons why it's limited to partner restaurants.
You cannot purchase "540" at typical supermarkets or online produce markets.
This is because, in addition to limited production volume, long-term aged potatoes are extremely difficult to manage and control in terms of temperature fluctuations.
Therefore, "540" is supplied directly to trusted partner restaurants that share the passion of the producers and wholesalers and possess the skills to bring out its rich flavor.
[ Kutchan/ Niseko Area] Main Partner Restaurants Where You Can Eat "Goyon"
The following are some of the main officially affiliated restaurants in Kutchan Town and the Niseko area where you can actually taste "540".
■ Wagyu & Hokkaido Seafood Niseko Naniwatei (Kutchan Town/ Niseko)
■ Creative Dining Kuzuishi (Kutchan Town/ City Center Area)
Charcoal-grilled izakaya Tamari-ba (Kutchan Town/ City Center Area)
*Due to the limited production volume of this rare ingredient, please contact each establishment directly for the latest availability, opening hours, and whether advance reservations are required.
summary

Kutchan potato "540" is a "miracle potato" created by the rich natural environment of Hokkaido and the long period of time it takes to grow for a year and a half.
Why not make Kutchan your next travel destination to experience the special deliciousness that only those who visit the area can enjoy?
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