0.5ct engagement ring
0.5ct engagement ring

Engagement Ring Making Class

Diamond included ¥132,000

MITUBACI is a modern rustic space that enables one to experience making their own engagement ring. The base price of the handmade engagement ring workshop covers the materials of the ring. This includes hand engraving, one center diamond and jewelry box. 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.

MITUBACI’s handmade wedding band workshops are conducted and supported by our veteran artisans who are experienced at crafting custom-made jewelry. Under their thorough guidance, even beginners are able to complete the jewelry-making processes with confidence. Our tanzō forging method adds durability to your jewelry and ensures quality that lasts a lifetime. Moreover, it is an exciting experience to turn precious metals such as platinum (Pt950) and gold (18k) into rings with your own hands!

At MITUBACI, you can personally inscribe your ring for free. We will practice before the actual production, and our craftsmen will help you with any minor modifications. If you are still concernedMachine engraving by engraving machine (free of charge)andOption to engrave with laser machinePlease feel free to contact us for more information.

We also recommend you and your partner exchange making your handmade wedding rings! Not only will you get to make your precious keepsake with each other, but you are also making for each other. Feel free to take photographs and videos to capture the memorable experience!

Customize your jewelry further with your partner's name or birthstone! Sometimes, symbols make one feel closer to the other even when apart.Make your only one in the world handmade wedding rings with us today.

Prices will be revised for new reservations made on or after May 1, 2024; reservations made until April 30, 2024 will be made at the old prices, even if your visit is on or after May 1, 2024. Click here to see the price revision.


Under the guidance of our craftsmen, you will create your own engagement ring. You can make the ring by yourself, or you can come to the store and work together.From the metal selection to hand engraving, shaping and soldering, applying texture, and diamond setting, the whole process takes around 3 hours.The base price of this workshop includes a diamond, and the best part is being able to create your one-of-a-kind jewelry in the world, complete it and wear it on the very same day!

Workshop Pricing

The price for DIY engagement ring workshop is determined by the size of diamond (carat), width, and add-ons. The choice of metal (e.g. platinum and 18k gold) poses no influence on the final cost.

Japan Tax-free Shop

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.



Width 1.7mm











Japan Tax-free Shop

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.


The one and only handmade engagement ring for the one you love

In MITUBACI's engagement ring workshop, you will handcraft the ring portion. Choose from our selection of platinum and colored 18k gold; our most popular materials are platinum and our original 18k champagne gold. Select your preferred diamond carat from 0.1ct, 0.2ct, 0.3ct, or 0.5ct and it will be set by our craftsmen on the spot on the ring you have made. Other than 0.1ct diamonds, all diamonds come with a certificate of authenticity.

Like the image above, you may also wish to opt for senban finishes for a more refined and professional look.

MITUBACI 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.


MITUBACI engagement rings are made with natural diamonds of the grades used in our custom-made products. 0.1 ct. to 0.3 ct. diamond grades are available in F color or better, SI-1 or better, and triple excellent or better. 0.5 ct. is available to suit your budget. You can choose the grade of diamond that best fits your budget. A certificate of authenticity is also provided as a proof of quality.
Diamonds are measured by international standards called the 4Cs, which are an objective way of evaluating diamonds: Carat, Color, Clarity, and Cut.

A carat is a unit of weight of a diamond; one carat is 0.2 grams. MITUBACI Tokyo offers 0.1ct, 0.2ct, 0.3ct, and 0.5ct diamonds.

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 by MITUBACI Tokyo are natural diamonds.


Choose your ring from five colors and metal types. Whatever your choice, there is no additional charge!

Platinum 950

18k Yellow Gold
18k Champagne Gold
18k Rose Gold
18k Lime Gold

Design and surface finish

Snowflake texture is recommended for engagement rings. This texture works well with both platinum and gold, and together with the sparkle of diamonds, they emphasize the overall brilliance of the engagement ring.


Metal Stamp Engraving
Machine Engraving

Similar to other workshop menu at MITUBACI Tokyo, Customers may engrave their names and initials, special dates, or even messages at no additional cost. Customers can choose between hand engraving by yourself with metal stamps for an enhanced handmade vibe (left) and hand engraving with engraving machine done by our artisans for a neater result (right).

Alternatively, you may opt for laser engraving to include Japanese, Chinese, emojis, or handwritten characters on your jewelry (additional charges will incur).


Senban finishes are achieved by precision cutting using the lathe machine. Workshop participants will complete jewelry-making processes such as engraving and forming the shape of the ring. Our veteran artisans then work on the finishing touches comparable to a custom order ring. These finishes are perfect for you if you wish to make your own jewelry and achieve an impeccable finish. (Please note that the various senban designs are applicable to different ring widths under 3.5mm and plain surfaces only.)
* Mare: Applicable to widths between 2.5 mm - 3.5 mm
* Side Milgrain: Applicable to widths between 2.0 mm - 3.5 mm

You can request our skilled artisans to create wedding bands and engagement ring on your behalf for a nominal fee on top of our handmade wedding bands pricing! This service offers high quality wedding bands at reasonable pricing. Your rings will be crafted by professional artisans who deal with made-to-order bridal jewelry on a daily basis. At MITUBACI, we believe that high quality bridal jewelry does not always have to be expensive. Even if you live far away, you may consult in our artisans online!Learn More


Champagne Gold Engagement Ring with Foresta Texture

A champagne gold engagement ring with a sparkling diamond and foresta texture that brings one closer to nature.

Champagne Gold Engagement Ring with Hammered Texture

The facets of the hammered texture reflect light rhythmically. The brilliance of the sparkling surfaces is augmented further with a shiny diamond. With a straight silhouette, this ring can be worn on its own or stacked with a wedding band.

Yellow Gold Engagement Ring with Matte Finish

Mattified yellow gold ring helps to draw more attention to the brilliance of the 0.3 carat diamond.

Platinum Engagement Ring with Hammered Texture

Shiny facets of the metal complement the beautiful diamond. The customer who made this engagement ring intended to propose the following day. At MITUBACI, engagement rings can be completed and brought home on the same day.

0.2 and 0.5 Carats Engagement Rings

The base price of MITUBACI handmade engagement ring includes a 0.2-carat diamond, but one can opt for a larger diamond of either 0.3- or 0.5-carats. This image shows the size difference between 0.2-(left) and 0.5-carat (right) diamonds.


Even with stone-setting or laser engraving!

At MITUBACI TOKYO, all handmade jewelry can be taken home on the same day of your visit.

There are very few workshops in Japan that can complete a ring on the same day with complex processes such as stone-setting and laser engraving. It is only possible when a place is equipped with professional tools and experienced craftsmen are readily available.

Our same-day completion and collection services emphasise on convenience and cater to those with a tight schedule.

Customer Reviews

Complimentary ring gauge rental

Complimentary ring gauge rental

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!

Lifetime Warranty and After-sales Services

MITUBACI TOKYO offers a lifetime warranty service. We provide maintenance for your jewelry for a lifetime so you can wear them with peace of mind. Regardless of handmade jewelry or order-made jewelry, all our jewelry is cared for by our skilled artisans. After-sales services include resizing, cleaning, and polishing to ensure that your MITUBACI jewelry remains beautiful and in mint condition over the years.

Touching Up Surfaces & Cleaning

Free of charge (visit atelier in person)

Our after-sales service covers not only cleaning but also touching up your textures so that they look as good as new. Regular maintenance will enhance the brilliance of your jewelry, so please feel free to make an appointment with us to enjoy these services!

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).


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, we provide original ring boxes to customers who opt for handmade wedding bands and handmade engagement ring workshops.

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 this 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!


MITUBACI TOKYO is 1 minute on foot from Sangenjaya station.
Before visiting us, please find the easiest route for you!

Tokyu Den-en-toshi line (DT) / Setagaya line (SG)
1-minute walk from Sangenjaya Station

Tokyo, Setagaya City, Sangenjaya
2 Chome−14−10 #407

Open hours 9:00am - 6:00pm
  • 4 minutes from Shibuya
  • 10 minutes from Harajuku and Omotesando
  • 20 minutes from Ginza and Roppongi area


Make your reservation online today

Senban Finish

Senban finishes are achieved by precision cutting using the lathe machine. Workshop participants will complete jewelry-making processes such as engraving and forming the shape of the ring. Our veteran artisans then work on the finishing touches comparable to a custom order ring. These finishes are perfect for you if you wish to make your own jewelry and achieve an impeccable finish. (Please note that the various senban designs are applicable to different ring widths under 3.5mm and plain surfaces only.)


+¥5,500 yen

The sides of the ring are gently shaved to create a rounded surface. The oval contour is a timeless classic with a gentle impression. Given its simplicity and comfort, it is the most popular senban design.


+¥5,500 yen

Mare refers to "sea" in Italian. With a concave contour, it reminds one of the ebb and flow of waves.
* Compatible with ring widths from 2.5mm to 3.5mm.


+¥5,500 yen

The ring is shaved from the center to the sides at an oblique angle, revealing a contour similar to the peak of a mountain.



Add more character to your senban contours with a single groove in the center of your ring as an accent. Recommended to pair the design with a single diamond.

Center Milgrain


Add more character to your senban contours with the classic and vintage milgrain detailing in the center.

Side Milgrain


Add more character to your senban contours with the classic and vintage milgrain detailing one or both edges of your ring (the price remains the same for one-sided milgrain).
* Compatible with ring widths from 2.0mm to 3.5mm.

Stone Setting Option
(Secret Stone)

Add more meaning to your jewelry with secret stones set on the inner wall of your ring!


*Diamonds, ruby, sapphire, and emerald +¥16,500.

January — GarnetFebruary — Amethyst
March — AquamarineApril — Diamond *
May — Emerald *June — Moonstone
July — Ruby *August — Peridot
September — Sapphire *October — Tourmaline
November — CitrineDecember — Tanzanite

Stone setting takes additional 1~1.5 hours after you complete making your jewelry. If you have a tight schedule, please inform our staff and we can arrange for delivery of your items at a later date.

Laser Engraving

+¥5,500 yen

Laser engraving requires additional time. Choose the font of your choice from our selection. Chinese characters and emojis are also available.

Click here to learn more.

Handwritten Engraving


You can also laser-engrave your handwriting or hand-drawn illustrations! Please prepare your data in advance and send us the scanned data or draw it when you visit our store. Please note that data given to us on the spot requires additional time.

Pixel art engraving


Design your pixel art in a 16 x 16 grid and have it engraved on your jewelry. Please submit your design at least 3 days before your visit.

For more information, please visit the Pixel Art Engraving blog.