Dadacha-mame: The Phantom Edamame That Grows Only in Tsuruoka and Shonai

Dadacha-mame Edamame

Dadacha-mame is a traditional local edamame variety from the Shonai region of Tsuruoka in Yamagata, a special edamame created by the soil and climate of Shonai. It is far sweeter and richer in umami than ordinary edamame. Dadacha means father in the Shonai dialect, and one story holds that the name arose when the lord of the castle town of Tsuruoka, who loved edamame, asked whose fathers beans these were today.

Characteristics

• Origin: Areas such as the Shirayama district of Tsuruoka are famous producers, and the beans are said not to taste the same grown outside the Shonai region
• Harvest Period: Roughly late July through September, with the peak season passing like a relay among varieties
• Flavor: Much sweeter and richer than normal edamame, with a distinctive corn-like aroma when boiled
• Appearance: The pods have brownish fuzz and the beans are somewhat small and plain-looking, but the flavor is exceptional
• Varieties: Multiple varieties with different harvest times, from the early kanro to the shirayama that peaks around the Bon season

Buying and Eating

• Direct-sale shops in Tsuruoka: Fresh dadacha-mame can be bought during harvest season, with seasonal stands opening in districts such as Oizumi
• Roadside stations and farm stands: Shonai produce gathers here and is easy to find in season
• Salt-boiled: The simplest and most delicious preparation; trim the pod ends, rub with salt, and boil to bring out the flavor
• Processed foods: Edamame rice, zunda, and sweets are also popular

Getting There

• Nearest station: JR Tsuruoka Station on the Uetsu Main Line
• By car: From Tsuruoka IC on the Yamagata Expressway into the city
• Airport: About 20 minutes by car from Shonai Airport
• Direct-sale stands: Seasonal stands in areas such as Oizumi open for periods that vary by year, so check in advance

Practical Travel Notes

• Best Season: The peak for Bon-season beans such as shirayama dadacha is around mid-August, the ideal time to visit
• Best Time of Day: For the freshest morning-picked beans, aim for direct-sale shops just after they open in the morning
• Time Needed: Shopping at farm stands is quick, and pairs well with a day exploring Tsuruoka and Shonai
• Nearby Real Spots: Combine with Tsuruoka city and its museums, the Three Mountains of Dewa, and the hot springs of Shonai and Sakata
• Budget: Fresh dadacha-mame is available at modest prices in season, and frozen products or edamame sweets travel well as souvenirs
• Note: Dadacha-mame is a fresh product at its best when eaten soon after harvest, and the peak is limited to a short summer window, so time your visit accordingly

Tips

Dadacha-mame is a fresh product whose flavor fades soon after harvest, so it is said to be tastiest eaten close to the production area during the season. The peak comes in a short summer window and shifts gradually among varieties. Shirayama dadacha around the Bon season is especially popular, and because the opening periods of direct-sale stands vary by year, check the latest timing through Tsuruoka tourism information before visiting. Frozen products and edamame sweets are convenient souvenirs.

📚 Sources

This article is based on the guidance for edamame published by Tsuruoka City and the Shonai regional tourism and agricultural organizations, and materials on the heirloom edamame and Shonai food culture. The season for dadacha-mame, its availability at direct-sale shops and restaurants, and whether harvest experiences are offered vary by season and year, so please confirm the latest details through Tsuruoka City or each operator before visiting. As the shipping period is limited, please also plan your purchases in advance.

Visitor Checklist

• Estimated time: About 1 to 2 hours to shop at direct-sale outlets or enjoy a meal
• What to bring: A cooler bag is handy for carrying purchased beans home, plus clothing suited to the season
• Timing tips: Taste dadacha-mame at direct-sale shops and restaurants during the summer peak
• Highlights: The sweet, rich heirloom edamame, the name origin tied to the castle town of Tsuruoka, and Shonai food culture
• Note: As this specialty has a limited season, check the timing before visiting

Practical Information for Your Visit

• Opening period of the Oizumi Dadacha-mame direct sales stand: Usually from late July to the end of August. In 2026 it is scheduled to run from July 21 (Monday, a public holiday) to late August
• Opening hours: 8:15 to around 12:00 (numbered tickets are handed out from 8:00, and sales end as soon as stock sells out)
• Location: A special tent in the car park of the JA Tsuruoka Chuo Branch (191 Nishino, Hakusan, Tsuruoka City, Yamagata Prefecture)
• Products on sale: Bundles of 1 kg on the branch, and 600 g bags of loose beans
• Guide to the varieties on sale: From late July, Komagi; from the end of July to early August, Wase Kanro; from early August, Kanro; from mid-August, Wase Hakusan; from around late August, Hakusan
• Access (by car): About 6 minutes from the "Tsuruoka IC" on the Yamagata Expressway
• Access (by bus): Take the Shonai Kotsu bus bound for Atsumi Onsen, get off at "Oizumi Shomae" and walk about 3 minutes
• Guide to the shipping season: Shipping begins in late July, with the true peak just after the old Bon holiday. It continues until mid-September
• Trivia: The council made up of the producers' association, JA Tsuruoka and Tsuruoka City has designated August 8 as "Dadacha-mame Day"

Note: Selling prices differ from shop to shop. Please check the official information of each shop before buying.

(Sources: Tsuruoka Kanko Navi (DEGAM Tsuruoka Tourism Bureau) / Tsuruoka City official website "Dadacha-mame, Tsuruoka's heirloom green soybean")