OHYA, the metalworking brand from Kawasaki, Kanagawa-based friction-welding manufacturer Oya Seisakujyo, is exhibiting at the 17th Dai-Nippon Ichi trade show, held September 2 (Wed) to 4 (Fri), 2026, at TFT Hall in Ariake, Tokyo. At the venue, OHYA is offering an early preview sale of three new metal cold tea cups launching September 5, "Nagomi," "Kizashi," and "Urara," each priced at 18,500 yen (tax included), ahead of their general release.
The cool touch of metal outside meets a warm splash of color inside — two contrasting expressions captured in a single cup.
The Warmth of Color Inside a Cool Metal Cup
The series joins two different metals, brass and aluminum, at the molecular level using the friction welding technology that OHYA specializes in.
Metal spinning (hera-shibori) gives each cup a rounded, gently curved form.
The exterior keeps a clear finish that shows off the metal's natural hairline texture, preserving its cool, refreshing feel.
The interior that touches the lips, meanwhile, is finished in Kishu Ginsai-nuri, a lacquering technique passed down in Wakayama Prefecture. Keisuke Shima of the lacquer workshop Ippin-ya (壱品屋) finishes each piece by hand using modern urethane paint.
The series name, "GINSAI," comes from this Kishu Ginsai-nuri technique.
A Refreshing Cup to Share With Someone Special
The series lets you enjoy cold tea or drinks with the distinctive cool touch of metal. With each sip, the cool metal against your lips and the soft color inside alternate, making a hot-season moment feel more memorable.
The cups suit both everyday hospitality for guests and gifts for someone special: the deep green "Nagomi," the soft gold "Kizashi," and the pale cherry-blossom pink "Urara."
Each of the three has its own character, so there's room to choose based on the recipient's style or the season.
Because each piece is finished by hand, the pattern inside varies from cup to cup — no two are exactly alike, making every piece one of a kind. That individuality is part of what makes each cup a fitting gift.
New Product Lineup
Product Overview
- Product names: Nagomi, Kizashi, Urara
- Release date: September 5 (Sat), 2026 (early preview sale at the Dai-Nippon Ichi venue ahead of general release)
- Price: 18,500 yen each (tax included)
- Where to buy: OHYA's official website (https://shop.ohya-seisakujyo.com/), among other outlets, with early preview sales also available at the Dai-Nippon Ichi venue (OHYA booth No. 17)
More product details are available at:
- Website: https://shop.ohya-seisakujyo.com/
- Instagram: https://www.instagram.com/ohya_japan/
Nagomi
Kizashi
Urara
Exhibition Overview
- Exhibition: 17th Dai-Nippon Ichi
- Dates: September 2 (Wed) to September 4 (Fri), 2026, 10:00 AM to 7:00 PM (closes at 3:00 PM on the final day)
- Venue: TFT Hall (TFT Building West Wing 2F, 3-4-10 Ariake, Koto-ku, Tokyo)
- Organizer: Nakagawa Masashichi Shoten Co., Ltd.
- Number of exhibiting brands: 159 (the most ever)
- OHYA booth number: 17
- Admission: By reservation (reserve through the official website; same-day reservations also accepted)
- Official website: https://www.dainipponichi.jp/
Friction welding
What Is Friction Welding?
A technique that rubs two metals together at high speed to generate friction heat, then applies pressure to bond them at the molecular level. It produces a strong join and allows different metals to be combined.
What Is Metal Spinning (Hera-shibori)?
A technique that shapes a rotating metal sheet by pressing a rod against it. It is considered a traditional craft that is difficult to mechanize because of the delicacy that only a skilled artisan's hand can reproduce.
Metal spinning
What Comes Next
Combining friction welding with metal spinning is, according to OHYA, unique to the company worldwide, and is said to be the first such combination in both the sake-cup and metalworking industries.*
Even so, the number of people carrying on these manufacturing techniques is declining. OHYA hopes its products can help pass on a range of traditional techniques, and it is with that in mind that the team puts care into every step of the process.
Bringing Japan's valuable beauty and time-honored artisan craftsmanship to the world.
*Based on the company's own research within Japan, as of March 2026.
