Private workshop at a hideaway in Sangenjaya

You are looking for a special place

A place where you can spend your own time without worrying about the eyes of others was born in Sangenjaya.

MITUBACI opened its "MITUBACI Main Store" in 2025, and from February 2026, the annex, "MITUBACI TOKYO 407We are pleased to announce the start of the long-awaited "Complete Charter Plan" at

From now on, we are pleased to offer the luxury of this creative space for exclusive use by a minimum of 4 persons!

What kind of space is MITUBACI TOKYO 407?

Room 407, with its calm interior and soft light, retains the atmosphere of a fashionable engraving studio.

The "creative and quiet atmosphere that only an atelier can provide" is the attraction.

  • Excellent private feeling: Located in a renovated 50-year-old building in the Sangenjaya triangle, it is a true hideaway.
  • The interior design with special attention to detail: Craftsmen's vintage-inspired tools and atelier decor.
  • Access: One minute walk from Sangenjaya Station.

Create special memories at our hideaway in Sancha

From creating special memories with family to deep gatherings of hobbyists.

If there are four of you, it is your own "secret atelier.

The best memories with the best friends. Making rings to commemorate your graduation.

Why don't you make matching silver rings with four good friends who spent their student life together?

With the private wedding plan, which started in February 2026 at the beginning of the graduation season, you can immerse yourself in the creation of the ring at your own pace while reminiscing about the past. The ring engraved with a smile and a laugh will be a treasure for a lifetime, reminding you of the bond you share even after you are separated.

A milestone celebrated by three generations. Celebrating Grandma and Grandpa."

Celebrate important milestones such as kanreki (60th birthday) and koki (70th birthday) with the whole family.

Room 407 is completely private, so there is no need to worry about small children. There is no need to worry about the eyes of those around you, even if they cry or move around energetically. The time spent making silver items with grandchildren is the best present for grandparents. Please spend a warm time with your family on a comfortable sofa or in a calm space.

Luxurious "guessing life" that gives shape to love

I want to wear my favorite "guess" color.

MITUBACI can make such wishes come true. Choose your favorite item from a ring, pendant, or bangle, and set a "birthstone" in the color of your guess as a finishing touch. In a private space, you can freely take pictures with your favorite accoutrements and stuffed animals, and talk about the charms of your guess. Why not complete your one-of-a-kind "conceptual item" in your own private sanctuary?

Creative Training" to strengthen team bonding

We left our usual meeting room for a team-building session in a craftsman's atelier.

MITUBACI workshops are also ideal for corporate training and departmental social gatherings. The process of mindlessly pounding and polishing metal around the same table provides a shared sense of accomplishment that cannot be experienced in our digital daily lives. Engraving the finished ring or bangle with the team's common watchword or goal will further strengthen the unity of the team. In small units of 4 to 8 people, you can experience a new kind of in-house exchange, where creative stimulation and flat conversations are generated.

Let us know how you use your own "407".

We started this style in February 2026 in order to deliver our valued concept of "craftsmanship that caters to each individual" in a more in-depth way.

The atelier as a place has a mysterious power.

The sound of metal being struck, the texture of the tools, and the handiwork of the craftspeople all come together to create a space in which you can honestly say thank you for something you normally can't say, or a new idea comes to mind.

'I want to use it for a gathering like this, is that okay?'

'I want to surprise you with a celebration, can you help me?'

We want the space to be special, in the colors we're guessing!"

Please let us know your ideas and ideas. Our atelier is staffed by professional craftsmen, so we will do our best to assist you in terms of both technology and space.

We look forward to welcoming you to our Sangenjaya retreat and to the beginning of your own special story.

How to make a reservation

407の貸し切りでのワークショップをご希望の方は、contact@mitubaci.co.jpまでお問い合わせください!

Private workshop at a hideaway in Sangenjaya
Experience the handmade.

All of MITUBACI TOKYO's handmade jewelry courses are conducted by professional artisans.
All our final prices are indicated on our website for your consideration with ease.

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Refer to the price list on our website for a detailed breakdown with no hidden cost.