Handcrafted by Japanese artisans.
Create a unique design.
A GIA gemologist selects your diamond.
About Custom Orders
Five features of our forged rings.
1.Design 
Feel free to consult with us on any design. We also have many samples available.
2.Diamonds by GIA Gemologist (G.G.)
Our GIA Graduate Gemologist carefully selects diamonds for their brilliance and quality. Leave the diamond selection to the experts!
3.Who Makes It
When you focus on jewelry quality, it leads to the question of “who makes it.” Let us introduce our skilled artisans at RENSHI.
4.Pricing
Our Japanese artisans handcraft each piece, delivering exceptional Japanese craftsmanship at a reasonable price.
5.Delivery Process
It takes approximately one month to complete your order.
Details of Each Step
Custom-Made Forged Engagement Rings
Each ring is handcrafted, ensuring your unique design.Feel free to explore your creative ideas for the design!
Popular Designs
Solitaire
An engagement ring designed with a single diamond.
While it features the simplest design, there are options for customizing the diamond setting and the shape of the ring.
Melee
An engagement ring designed with a large diamond and smaller diamonds known as melee.
Melee diamonds not only enhance the design but also accentuate the larger diamond, making it appear even more impressive.
Pavé
An engagement ring designed with small diamonds set closely together.
This style creates a glamorous look, making it perfect for those who prefer a sparkling design.
Eternity
A design featuring small diamonds set around half to a full circle of the ring. Some choose eternity for their wedding bands as well.
This style pairs beautifully with any design and is also easy to wear daily.
Diamond Settings
6-Prong Setting
The diamond is held by six prongs, the most classic setting for engagement rings.
4-Prong Setting
This setting gives a sleek look, allowing the diamond’s shape to stand out clearly.
Bezel Setting
The diamond is secured by a metal rim that surrounds it entirely. This setting minimizes snags, making it ideal for everyday wear.
Milgrain Setting
Diamonds are set with a milgrain detail, which makes the stones appear larger than their actual size.
We can also create designs not featured here.
Feel free to consult with us.
The most prestigious diamond certification in the world is the “GIA Graduate Gemologist (G.G.).”
Our diamond experts carefully select and offer diamonds with exceptional brilliance.
Choosing A Diamond Can Be Challenging
Choosing a diamond is very difficult. In fact, even many jewelry salespeople are not well-versed in diamonds.
You should never select a diamond based solely on its certificate.
What matters most, and isn’t reflected in the certificate, is the “brilliance”—the very element experts prioritize above all.
Leave it to our GIA Graduate Gemologist (G.G.)!
KIHOMARU
One of the approximately 2,000 GIA Graduate Gemologists in Japan, this expert speaks Japanese, English, Chinese, and Korean, and is active both domestically and across Asia.
Due to recent changes making it impossible to obtain the GIA G.G. qualification within Japan, they are one of the youngest certified experts in the country.
When it comes to engagement rings, many may struggle with questions like, “Which brand should I purchase from?” or “Which store should I choose?”
However, from a professional perspective, the most important factor is “who makes it.”
The Artisan’s Sensibility
Even with a wonderful design and layout, it is the artisan who ultimately brings it to life. The finishing touch will vary depending on the artisan.
It’s important to possess not only technical skills and knowledge but also a sense of “the definition of beauty” and “sensibility.
The Rarity of Artisans
Jewelry artisans become skilled through experience. However, with the downturn in the economy, job opportunities have decreased, and the environment for nurturing new artisans has become dire.
Additionally, the number of experienced artisans is steadily declining due to aging. Nevertheless, there are still exceptional artisans who remain.
RENSHI’s Artisans
Eiichi Kuniyoshi
I would like to introduce you to Renshi’s artisan.
Azuma Ito
Among all the artisans I’ve encountered, he is the best at polishing. His skill in enhancing the allure of precious metals is so exceptional that even seasoned craftsmen hold him in high regard.
His aesthetic sense in shaping is outstanding, with a remarkable ability to create designs that have distinct contrasts and flowing forms.
The reason I decided to start a high-quality engagement and wedding ring specialty store is due to my encounter with Mr. Ito.
Fumio Kuniyoshi
He is my father.
I have never encountered an artisan who can enhance the allure of diamonds quite like him.
The highest price ever achieved for one of his creations was a ring featuring a 3-carat pink diamond, which sold for over 200 million yen. (It’s tough for artisans, as they only receive labor fees.)
It may sound like family bragging, but he has become a legend in our family.
He typically specializes in high jewelry, and I often turn to him for complex designs or when I’m in a bind.
Although not mentioned here, we have many skilled artisans you can confidently rely on.
Feel free to consult us about anything regarding rings.
Due to the rising prices of diamonds and precious metals, the diamonds in popular engagement rings have been getting smaller each year, and the rings themselves are becoming thinner and more delicate.
As a result, low-quality diamonds and deforming rings are becoming prevalent, making it very difficult to distinguish the genuine ones.
High Quality at Reasonable Prices
At RENSHI, you can achieve high quality at reasonable prices.
Genuine quality cannot be fully appreciated just by seeing or trying it on; it is only through ownership that one truly understands its value.
We strive to deliver authentic pieces to as many people as possible.
How to Order
There are two ways to order: in-shop or online.
Order in-Shop
1.Book an Appointment
Feel free to contact us.
2.Consultation
We will discuss your design and provide a quote.
3.Ring Crafting
The completion of the rings takes about 1 to 1.5 months. Shorter lead times are also possible.
4.Completion & Delivery
We will deliver your order either by in-shop pickup or by shipping.
Order Online
1.Online Estimates
Feel free to contact us.
2.Place an Order
We will send you a dedicated order form, so please place your order.
3.Ring Crafting
The completion of the rings takes about 1 to 1.5 months. Shorter lead times are also possible.
4.Completion & Delivery
We will deliver it by shipping.
Custom-Made Forging
At Renshi, we create only “high-quality” engagement rings.
To achieve this quality, we focus on “who is involved in the production.”
A diamond expert, GIA Graduate Gemologist (G.G.), carefully selects the diamonds.
We clearly define “who makes the jewelry,” ensuring that skilled Japanese artisans produce high-quality pieces.
You can meet with us in person for consultations. Feel free to reach out.