MITUBACI TOKYO is a modern rustic space that enables you to make your own engagement ring. The base price of the handmade engagement ring workshop covers the materials of the ring, including one center diamond. Customers may also consider crafting their wedding bands concurrently!
MITUBACI takes pride in our jewelry-crafting quality and methods and ensures that wedding jewelry forged with us can last for a lifetime.
Time required: 3 to 4 hours
You may take your rings home on the very same day!
Under the guidance of our craftsmen, you will create your own engagement ring. You may make the ring alone or you may come to the store together to work on it. The engagement ring can be made in platinum or K18 gold (18k gold) with engraving, shaping, welding, surface treatment, and diamond setting, all in about 4 hours. Diamonds are included in the base price. The completed engagement ring can be taken home the same day.
Starting with design consultation, we will walk you through our samples and guide you in choosing your preferred material, ring width, designs, and finishes for your rings.
You can also see and confirm the size and color of the actual diamonds and colored gemstones from our extensive stock.
You may opt for free engraving methods like metal stamping which comprises alphabets, numerals, and original icons. Before working on your actual ring, we will provide you with a silver bar to practice engraving.
If you prefer a more flexible design, such as an illustration or Chinese characters, you can choose the optional laser engraving.
The precious metal plate is made into a ring shape. Since this work requires a lot of strength, a wooden mallet is also used to round it.
After rounding, you will solder your ring under the guidance of our craftsman. Our artisans will solder all platinum rings as they require a license to operate the burner.
* If you choose Platinum 950, the work will be performed by a craftsman in principle, as it requires the qualification of a gas welding technician.
At this stage, you will work with several tools to smoothen and polish the surfaces of your ring.Here the ring shines so beautifully that it reflects the surrounding scenery.
Also, lathing and milling can reproduce the superb quality of a custom-made engagement ring, despite the fact that it is handmade.
Our craftsman welds the base to the ring and clasps the stone.
Because of the high level of skill required, the work usually needs to be done by a specialized company, but MITUBACI TOKYO, where real metal engravers are always on hand, can carry out the work on the same day and deliver the final product to you.
Your one-of-a-kind engagement ring is now complete.
Rings can be taken home immediately.
We have compiled the entire engagement ring making process into a 2-minute short film, which we invite you to view.
In addition to the above processes, the engagement rings in the video are turned, milled, and laser engraved to achieve a professional finish as close as possible.
Some of our customers have invited their partner to MITUBACI TOKYO under the pretext of “let’s create a pair of jewelry together,” only to surprise them with a dazzling diamond engagement ring—creating a truly unforgettable moment.
We have created a short film inspired by a romantic marriage proposal successfully carried out by one of our real customers.
If you are planning a romantic proposal at the MITUBACI TOKYO workshop, we would be more than happy to assist!
The price for DIY engagement ring workshop is determined by the size of diamond (carat), width, and add-ons. You can enjoy engraving by yourself at no additional fees!
Diameter ±3.0mm
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.
Diameter 3.8mm
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.
Diameter 4.3mm
A 0.3-carat diamond, slightly larger and with a broader head, leaves an augmented impression on the finger.
Diameter 5.0mm
A 0.5-carat diamond ring is a luxurious choice. This diamond size is a showstopper that fills one with envy.
Diameter 5.8mm
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.
Diameter 6.5mm
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.
Diameter 3.8mm
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.
Diameter 3.8mm
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.
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.
In MITUBACI TOKYO's engagement ring making class, you will handcraft the ring portion of the ring. You can choose either platinum or colored gold as the material; MITUBACI TOKYO's most popular material is platinum, while the popular colored gold is our original champagne gold. A diamond will be set by our craftsmen on the spot on the ring you have made.
Like the image above, you may also wish to opt for senban finishes for a more refined and professional look.
MITUBACI TOKYO engagement rings can also be completed on the same day. This is great for those who require the ring urgently. The ring contour is simple and straight, making it perfect to stack with your wedding rings. It is also possible to make your wedding bands concurrently with your engagement ring.
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.
* Applicable to 1.7mm-3.5mm
* Tokyo store only
* Applicable to 1.7mm-3.5mm
* Tokyo store only
In addition to the standard plain finish, you can choose for free the popular hammer finish that brings out the craft aesthetic.
By using a lathe machine, craftsmen shape the ring into a uniform, beautiful, and luxurious-looking ring that evokes a custom-made ring.
* Compatible with ring widths up to 3.5mm. For widths larger than that, please contact us in advance.
You can add textures not only to the surface of your ring, but also to the sides! Side textures add extra detail and charm to your jewelry, allowing you to appreciate your craftsmanship from every angle. (Side textures are complimentary.)
Just like other workshop menu at MITUBACI TOKYO, customers may engrave their names and initials, special dates, or even messages at no additional cost. You can choose between hand engraving by yourself with metal stamps for an enhanced handmade vibe and hand engraving with engraving machine done by our artisans for a neater result.
Alternatively, you may opt for laser engraving to include Japanese, Chinese, emojis, or handwritten characters on your jewelry (additional charges will incur).
All of this, only at MITUBACI
There are very few workshops in the world that can complete a ring on the same day with complex processes such as stone-setting. It is only possible when a place is equipped with professional tools and experienced craftsmen are readily available.
Want to make an engagement ring in secrecy but uncertain about your partner's ring size? We offer a ring gauge rental service at no additional fees! In the event that the size needs alteration after the engagement ring is made, we will resize the ring free of charge, so worry not and book a class with us today!
MITUBACI 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.
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!
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).
We use natural diamonds of the grades used in our custom-made products: 0.1 ct. to 0.3 ct. diamonds with F color or better, SI-1 or better, and triple excellent or better. We also provide a certificate of authenticity as proof of quality.
Diamonds of 0.5 ct. and above are available in grades to suit your budget.
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. Our workshop allows customers to make a total of 3 rings on the very same day.
Yes, we can provide the diamond if you inform us at least two weeks in advance. Please also note that the pricing is separate from our menu.
Please contact us using the contact form before your visit..
MITUBACI TOKYO atelier has an open space interior that encourages customers to use the space with ease and engage in conversations with our craftsmen. Whether you visit alone or come in groups, we welcome all who wish to experience jewelry-making. Please feel free to take photographs or videos of your DIY processes and use them for social media or even share your experience at your wedding reception!
Tokyo (Sangenjaya)
Tokyu Den-en-toshi line (DT) / Setagaya line (SG)
1-minute walk from Sangenjaya Station
Add deeper meaning to your jewelry with a secret gemstone set on the inner wall of your ring.
+¥11,000
* Diamond・Ruby・
Sapphire・Emerald are
+¥16,500
 January — Garnet |  February — Amethyst |
 March — Aquamarine |  April — Diamond * |
 May — Emerald * |  June — Moonstone |
 July — Ruby * |  August — Peridot |
 September — Sapphire * |  October — Tourmaline |
 November — Citrine |  December — Tanzanite |
Gemstone setting takes around 1~1.5 hours after basic ring completion. If you are pressed for time after the workshop, please let us know and we will schedule for delivery at a later date.
The 4-point setting is MITUBACI’s standard gemstone setting. This classic style complements a wide range of ring designs.
Resembling a flower, this decorative style beautifully enhances the shine of both the gemstone and the metal.
*Not compatible with Senban finishes. Applicable to ring widths of 2.0mm and above.
* Not available for the secret gemstones (inner stones)
+¥5,500
+¥5,500
Choose your preferred font from our selection and engrave dates, names, and more. In addition to numbers and alphabets, we also support Kanji characters and our in-house engraving illustrations.
¥11,000
Handwritten messages and hand-drawn illustrations can also be laser-engraved! Please prepare your artwork in advance and send us a scanned copy prior to your visit, or create it in-store upon arrival. Kindly note that data provided on the day may require additional processing time.
+¥11,000
Design your pixel art in a 16 x 16 grid and have it engraved on your jewelry. Please submit your design at least 7 days before your visit.
For more information, please visit the Pixel Art Engraving blog.
*Available for rings of at least 3.0mm.
