Komugino Co., Ltd. (Chiyoda-ku, Tokyo; representative Naoto Sasayama) will grand-open a new soba brand, Juwari Soba Tamotsu ("Tamotsu"), on Saturday, July 18, 2026, on the first floor of "Kohoku Minamo," a commercial complex in Tsuzuki-ku, Yokohama.
Tamotsu serves juwari soba -- soba made purely from buckwheat flour -- with the goal of making its pure aroma and flavor easier to enjoy day to day. Its original "rough-cut" technique blends the smooth texture of thin noodles with the satisfying bite of medium-thick noodles in a single bowl, offering a new take on 100%-buckwheat soba.
The restaurant runs a soft-open period from Wednesday, July 1 through Friday, July 17, ahead of its grand opening on July 18. On opening day, the first 50 guests receive one bowl of the signature "Shinme Mori Soba" or "Tori Seiro" supervised by Chef Toba, free of charge, as part of an opening-day campaign.
Making 100%-Buckwheat Soba More Approachable
Juwari soba, made purely with buckwheat flour, lets diners enjoy the grain's rich aroma and flavor at their purest. It is often seen, though, as something best savored slowly at a specialty shop -- a slightly higher bar to clear.
Tamotsu aims to keep that authentic flavor while building a juwari soba shop people can stop into casually: between errands, on the way home from work, or for a family meal.
The project began with an idea from Takafumi Horie, who serves as the company's management strategy advisor: he wanted to build a truly delicious soba shop. Known widely as a serious soba enthusiast, Horie spent more than a year working on finding the right location and refining the menu without compromise.
Chef Shusaku Toba, who has partnered with Komugino on several past product and brand developments, joined the project after connecting with that vision. The restaurant's "Tori Seiro" (chicken dipping soba), supervised by Chef Toba, is one of its signature dishes.
Takafumi Horie
Born in Fukuoka Prefecture in 1972. Founder of SNS Co., Ltd. He currently focuses on rocket engine development while also producing smartphone apps such as "TERIYAKI," "Manga Shimbun," and "755." On Horiemon.com, he runs an ongoing series interviewing innovators across industries under the theme "Technology Changes the World." Through his online salon HIU (Horie Takafumi Innovation University), he not only advises but also takes part directly as a member in a wide range of projects. The bakery brand "Komugi no Dorei," which grew out of the HIU community, was his original concept, and he speaks at its monthly online information sessions for prospective franchise owners.
Horiemon Channel: http://www.youtube.com/user/takaponjp
Shusaku Toba
Representative Director, sio Co., Ltd.
After stints as a J.League trainee and an elementary school teacher, Toba entered the culinary world at 31. He opened the restaurant "sio" in 2018, which has appeared in the Michelin Guide Tokyo for six consecutive years since 2020. He now operates nine restaurants, including "sio YOYOGI UEHARA," "sio AOYAMA," "o/sio," "o/sio FUKUOKA," "㐂つね," "The New World," "Oishii Pasta," "NAGANO," and "FAMiRES." Beyond his restaurants, he shares recipes through books, YouTube, and social media, and works on food production more broadly. His motto: "Grow the denominator of happiness."
sio official website: https://sio-yoyogiuehara.com/
A "Rough-Cut" Noodle in Every Bowl
Tamotsu's defining feature is its original rough-cut style. Each bowl blends the smooth, comfortable texture of thin noodles with the satisfying bite of medium-thick ones, so the mouthfeel changes bite to bite while the aroma of 100%-buckwheat soba carries through to the last bite.
Because juwari soba is made purely from buckwheat flour, it delivers the grain's flavor directly, but it also demands a delicate touch in kneading and boiling. Tamotsu brings in the latest noodle-making equipment and pairs it with hands-on craftsmanship, so it can consistently serve soba that is freshly made and freshly boiled.
The signature menu includes the "Shinme Mori Soba," a simple dish that highlights the aroma and rough-cut texture of the 100%-buckwheat noodles, and the "Tori Seiro" supervised by Chef Toba, which pairs freshly made, freshly boiled soba with a chicken-based dipping sauce built around the savoriness of chicken.
The menu also includes the "Niku Soba Seiro" for guests wanting a heartier meal, the "Ao-Togarashi and Kujo Negi Tanuki Bukkake Soba" with the refreshing heat of green chili and the aroma of Kujo green onion, and the "Mini-Ju and Mori Soba Set," which pairs mori soba with a small rice bowl -- an everyday-friendly lineup.
Tamotsu's signature "Tori Seiro" supervised by Chef Toba
Soft Open Begins July 1, Ahead of the Grand Opening
Tamotsu runs a soft-open period from Wednesday, July 1 through Friday, July 17, 2026, with hours and closed days that differ from its regular schedule. Guests planning a visit during this period should check the schedule below.
Soft-Open Hours
- July 1 (Wed) to July 3 (Fri): 11:00 AM to 3:00 PM
- July 4 (Sat): 11:00 AM to 3:00 PM / 5:00 PM to 10:00 PM
- July 5 (Sun): 11:00 AM to 3:00 PM / 5:00 PM to 8:00 PM
- July 6 (Mon): 11:00 AM to 3:00 PM / 5:00 PM to 9:00 PM
- July 7 (Tue) and 8 (Wed): Closed
- July 9 (Thu) and 10 (Fri): 11:00 AM to 3:00 PM / 5:00 PM to 9:00 PM
- July 11 (Sat): 11:00 AM to 10:00 PM
- July 12 (Sun): 11:00 AM to 8:00 PM
- July 13 (Mon): 11:00 AM to 3:00 PM / 5:00 PM to 9:00 PM
- July 14 (Tue) and 15 (Wed): Closed
- July 16 (Thu): 11:00 AM to 3:00 PM / 5:00 PM to 9:00 PM
- July 17 (Fri): Closed
Hours during the soft-open period are subject to change.
Opening Day: Free Bowls for the First 50 Guests
On the grand-opening day of Saturday, July 18, 2026, Tamotsu will run an opening-day campaign offering the first 50 guests a free bowl of "Shinme Mori Soba" or "Tori Seiro" supervised by Chef Toba.
It's a chance to taste Tamotsu's signature dishes, freshly made and freshly boiled, available only on the day of the grand opening.
Opening-Day Campaign Details
- Date: Saturday, July 18, 2026
- Details: The first 50 guests receive one free bowl of "Shinme Mori Soba" or "Tori Seiro" supervised by Chef Toba
- Eligible guests: First 50 guests
- Eligible menu: Shinme Mori Soba / Tori Seiro supervised by Chef Toba
The campaign ends once the allotted quantity is reached, and campaign details are subject to change.
Tamotsu plans to expand nationwide through franchising as it grows beyond this first location.
Store Overview
- Name: Juwari Soba Tamotsu
- Address: Kohoku Minamo 1F, 2-7-1 Nakagawa-chuo, Tsuzuki-ku, Yokohama, Kanagawa
- Phone: 045-620-7774
- Soft open: Wednesday, July 1, 2026
- Grand open: Saturday, July 18, 2026
- Regular hours: Weekdays 11:00 AM to 9:00 PM / Saturdays 11:00 AM to 10:00 PM / Sundays 11:00 AM to 8:00 PM
- Closed: None
- Seats: 57
- Parking: 100 spaces
- Official social media: https://www.instagram.com/jyuwarisoba.tamotsu/
