Diamond/Gemstones Ring Making Class
- Same-day Delivery
- All-inclusive pricing (course & material)
- Guided by artisans
Handcraft a ring starring diamonds, rubies, or sapphires, and add a vibrant touch to your everyday style. Mix and match colors that reflect your personality to create a fashionable, one-of-a-kind piece that complements any look. Your finished ring, with the stone setting, can be taken home the same day! Offered exclusively by MITUBACI TOKYO, this experience is made possible by our in-house workshop and team of skilled artisans.
There will be a price revision for new reservations made on or after February 1, 2026. If you make a reservation by 23:59 Japan time on January 31, 2026, the old price will be applied regardless of the date of your visit. Please make your reservation as soon as possible. LEARN MORE
ADD A POP OF COLOR TO YOUR DAY
Shaping, engraving, welding, and surface finishing are all done by you under the guidance of a skilled craftsman. The more advanced processes—such as preparing the stone seat and setting the stone—are handled by our experienced artisans, and the finished ring is ready for you to take home on the same day. We hope you'll enjoy the experience of choosing your precious metal and gemstone, crafting the ring with your hands, and witnessing the refined techniques that Japanese craftsmanship is known for.
WORKSHOP PRICING
The course price includes all costs to complete the ring.
You can also add options as you like for further originality.
GEMSTONE TYPES AND SIZES
Diamond 0.1ct
Diameter ±3.0mm
¥165,000 per ring
¥150,000 tax free
A 0.1-carat diamond is an affordable option that makes beautiful, simple, and subtle ring. Despite being on the petite end, its color, clarity, and cut are selected carefully to meet the standards of other diamonds we offer.
Diamond 0.2ct
Diameter 3.8mm
¥209,000 per ring
¥190,000 tax free
A 0.2-carat diamond sufficiently brings out the brilliance of the ring. It acts as an accent to special occasions such as dinners, parties and holidays, and is befitting for everyday wear.
Diamond 0.3ct
Diameter 4.3mm
¥286,000 per ring
¥260,000 tax free
A 0.3-carat diamond, slightly larger and with a broader head, leaves an augmented impression on the finger.
Diamond 0.5ct
Diameter 5.0mm
¥506,000〜 per ring
¥460,000〜 before tax
A 0.5-carat diamond ring is a luxurious choice. This diamond size is a showstopper that fills one with envy.
Diamond 0.7ct
Diameter 5.8mm
¥726,000〜 per ring
¥660,000〜 before tax
The 0.7ct diamond is breathtaking. Generally, this size is used for high-end engagement rings such as bespoke rings, but at MITUBACI TOKYO, you can also choose it for the engagement ring making class. Check out its brilliance with your own eyes.
Diamond 1.0ct
Diameter 6.5mm
¥1,111,000〜 per ring
¥1,010,000〜 before tax
A 1.0 carat diamond is the size of the ultimate in luxury and elegance. When it shines its dazzling light on a ring of your own making, it will become a lifelong symbol of your special story together.
Ruby
Diameter 3.8mm
¥209,000 per ring
¥190,000 tax free
Ruby is another classic choice for the center stone of an engagement ring. Besides being the birthstone of July, this stone symbolizes lifelong happiness. It is also a gorgeous gem suitable for formal occasions.
Equivalent to a 0.2ct diamond in size.
Sapphire
Diameter 3.8mm
¥209,000 per ring
¥190,000 tax free
Sapphire is another classic choice for the center stone of an engagement ring. It is also a favorite gemstone of the British Royal Family. The beautiful blue gemstone is said to represent love and brings wisdom to the wearer.
Equivalent to a 0.2ct diamond in size.
RING WIDTHS
1.7mm
+¥30,000 tax free
2.0mm
+¥15,000 tax free
+¥50,000 tax free
2.5mm
+¥30,000 tax free
+¥70,000 tax free
3.0mm
+¥50,000 tax free
+¥100,000 tax free
3.5mm
+¥70,000 tax free
+¥130,000 tax free
Enjoy Tax-free Shopping With Us!
Temporary visitors may enjoy tax-free shopping (10%) with us by presenting your original passport on the day of purchase.
PERFECT FOR THESE OCCASIONS
as an everyday accessory
Sometimes our personal effects are more than just a stylish wearable piece, sometimes they boost our confidence and become part of our identity.
as a gift for your partner
A classic design that augments the full brilliance of the stone, making it a truly cherished gift for anniversaries or special occasions; a romantic and heartfelt handmade present waiting to reveal itself from the jewelry box.
as a couple ring
You can also pair the diamond or color gemstone ring from this course with a standard platinum or gold ring to create a matching set. Craft your rings together and create a memorable experience with this pair of lifelong keepsakes.
as a milestone gift to yourself
Exquisite diamond and colored gemstone rings also make the perfect gift for yourself as a milestone memento.
PREMIUM QUALITY DIAMONDS
Diamonds are evaluated using an international standard known as the 4Cs: Carat, Color, Clarity, and Cut—each representing a key aspect of the diamond’s quality.
MITUBACI TOKYO uses natural diamonds of the same high grade as those found in custom-made jewelry. For diamonds ranging from 0.1ct to 0.3ct, we provide stones that are F color or higher, SI-1 clarity or higher, and Triple Excellent cut or better.
For diamonds 0.5ct and above, you can choose the grade based on your budget. A certificate of authenticity is included as proof of quality.
A carat is a unit of weight of a diamond; one carat is 0.2 grams.
Diamonds are classified between D (colorless) and Z (light yellow); MITUBACI TOKYO offers diamonds with F color or higher, which is classified as "colorless".
Clarity is an evaluation of a diamond's transparency. It is broadly divided into six categories. In descending order of evaluation, they are FL, IF, VVS, VS, SI, and I. They are further divided within each category, comprising a total of 11 grades.
The GIA Diamond Clarity Scale has six categories, some of which are subdivided, totaling to 11 grades.
MITUBACI TOKYO offers diamonds that are SI-1 (inclusions can be seen under 10x magnification) or higher.
Cut is an evaluation of a diamond's balance, symmetry, and polish. While color and clarity are the innate properties of a diamond, cut is an evaluation of the workmanship. The cut is divided into five grades: Excellent, the highest grade available at MITUBACI TOKYO, and Triple Excellent, the highest grade for overall evaluation, symmetry, and polish.
- Diamonds of 0.2 ct. or more come with a certificate of authenticity booklet from the CGI. While diamonds of 0.1 ct. do not come with a certificate of authenticity booklet, a simple certificate of authenticity is available upon request.
- While workshop participants can complete most of the ring-making process by themselves, our artisans will take over the stone setting process as it is more complicated.
- All diamonds provided are natural diamonds.
MATERIALS
Choose your ring from five colors and metal types.
Design and surface finish
Plain
A timeless classic. The mirrored finish may look simple, but a lot of work goes into achieving a beautifully polished look! The sense of satisfaction lies in watching your jewelry shine after repeated sanding and buffing. The color of the gold is emphasized when matted.
Hammered
Akin to shimmering water surfaces, this texture is created with a round-tipped hammer. Every piece of jewelry has a unique pattern as it is formed depending on how one wields the hammer. A matted hammered surface gives it a subtler appearance (this is also the most popular texture!)
Foresta
Reminding one of the forests and trees, foresta texture is achieved using a hammer with a flat tip. A wider ring gives a closer resemblance to the tree trunk. Polished or matte, this texture is perfect for those who want a nature theme wedding band.
Snowflake
Resembling a snow flurry, this texture is impeccable in platinum but also looks glamorous in gold. Polish your ring for an emphasized look or mattify for a gentle glow.
Frost
Like frost forming on a winter window, this texture is created using a specially crafted hammer. Each ring is truly one-of-a-kind, as the pattern naturally varies with the hand of the maker. Choose a polished finish to highlight the texture, or opt for a matte surface for a softer, more subtle effect.
Stella
“Stella” means “star” in Italian, and true to its name, this texture evokes the enchanting shimmer of a starlit sky. Pair it with gemstones of your choice to create a truly personalized and radiant design.
ENGRAVING
At MITUBACI TOKYO, you can have your name, anniversary date, etc. engraved by your own hands free of charge. Customers can choose from two types of engraving: "hand engraving," in which the letters are directly stamped with a hammer using an iron stamp, or "machine engraving," in which the letters are slowly engraved using a special machine.
Alternatively, you may opt for laser engraving to include Japanese, Chinese, emojis, or handwritten characters on your jewelry (additional charges will incur).
ADD-ONS
PRICE SIMULATION
Total
¥ 0 tax included
Customer Reviews
We want to introduce Mr. and Mrs. K, who created a pair of matching 18k rose gold couple rings: a 0.2ct diamond ring and a ring with an emerald to commemorate a special anniversary.
Complimentary ring gauge rental
For customers considering handcrafting a ring at MITUBACI TOKYO, we offer a free ring gauge rental to help you accurately determine the correct ring size. If you’re planning a surprise gift but aren’t sure about the size, this service is perfect for you. And even if the ring doesn’t fit perfectly after it's made, we offer free resizing!
Lifetime Warranty and After-sales Services
MITUBACI TOKYO offers a lifetime warranty to ensure you can enjoy your jewelry with lasting peace of mind. Whether handmade or custom-made, each piece is cared for by our skilled artisans. Our after-sales services include resizing, cleaning, and polishing—keeping your jewelry beautiful for years to come.
Touching Up Surfaces & Cleaning
Free of charge (visit atelier in person)
Our after-sales service includes not only cleaning but also retouching the texture to restore your jewelry’s original beauty. Regular maintenance helps keep your piece shining—feel free to book an appointment anytime to enjoy this service!
Ring Size Adjustment
1st-time Free of Charge
2nd-time onwards from ¥5,500
The first ring resizing is free of charge! Subsequently, it will be chargeable from ¥5,500 onwards per ring (depending on the condition of your ring).
FAQ
We offer premium diamonds of grade F or more colorless, clarity of SI-1 or better, and triple excellent cut or higher.
Rings made with us can always be cleaned free of charge. First time resizing is also free. The second and subsequent resizing will be chargeable for a basic fee of 5,500 yen per ring.
Yes, you can take it home on the same day. Please note that there is a 1.5 to 2 hour waiting time for add-on options such as stone setting and laser engraving.
Yes, the ring will be delivered with a box.
Yes, it is possible. We can also make a set of rings without diamonds or colored stones and use them as a pair ring. Of course, you can take both rings home with you on the same day.
Although the courses are separated for various occasions, the rings will be of the same design and quality as the engagement ring course. You can rest assured that while the rings are fashionable, they will be fine jewelry of the high quality that only an engagement ring grade can provide.
HOW TO GET HERE
MITUBACI TOKYO has two stores in Sangenjaya.
All are conveniently located just a minute walk from the station.
Tokyu Den-en-toshi line (DT) / Setagaya line (SG)
1-minute walk from Sangenjaya Station
- 4 minutes from Shibuya
- 10 minutes from Harajuku and Omotesando
- 20 minutes from Ginza and Roppongi area
January — Garnet
February — Amethyst
March — Aquamarine
April — Diamond *
May — Emerald *
June — Moonstone
July — Ruby *
August — Peridot
September — Sapphire *
October — Tourmaline
November — Citrine
December — Tanzanite
