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Diamond Engagement Rings
婚約指輪
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18K Colorless Pear Diamond Ring - 0.682ct
Regular price ¥390,000 (Tax incl.)Unit price per -
18K Colorless Pear-cut Diamond Ring - 0.682ct
Regular price ¥390,000 (Tax incl.)Unit price per -
18K Colorless Round-cut Diamond Ring - 0.425ct
Regular price ¥260,000 (Tax incl.)Unit price per -
18K Colorless Cushion-cut Diamond Ring - 0.844ct
Regular price ¥440,000 (Tax incl.)Unit price per -
18K Round-cut Near Colorless Diamond Ring - 1.005ct
Regular price ¥480,000 (Tax incl.)Unit price per -
18K Round-cut Colorless Diamond Ring - 1.168ct
Regular price ¥490,000 (Tax incl.)Unit price per -
Pear Near Colorless Diamond Ring - 1.008ct
Regular price ¥350,000 (Tax incl.)Unit price per -
Mael Cushion Light Yellow Diamond Ring - 0.835ct
Regular price ¥340,000 (Tax incl.)Unit price per -
18K Cushion-cut Vivid Yellow Diamond Ring - 1.148ct
Regular price ¥590,000 (Tax incl.)Unit price perNEW -
18K Pear-cut Fancy Light Brownish Pink Diamond Ring - 0.57ct
Regular price ¥620,000 (Tax incl.)Unit price per -
18K Radiant-cut Near Colorless Diamond Ring - 1.66ct
Regular price ¥1,100,000 (Tax incl.)Unit price perNEW -
18K Oval-cut Colorless Diamond Ring - 1.764ct
Regular price ¥1,200,000 (Tax incl.)Unit price perNEW -
18K Oval-cut Colorless Diamond Ring - 0.835ct
Regular price ¥460,000 (Tax incl.)Unit price per -
18K Oval-cut Colorless Diamond Ring - 1.051ct
Regular price ¥850,000 (Tax incl.)Unit price per -
18KYG Colorless Diamond Ring Cushion-cut - 0.635ct
Regular price ¥350,000 (Tax incl.)Unit price per -
18K Colorless Diamond Ring Round-cut - 1.196ct
Regular price ¥570,000 (Tax incl.)Unit price per -
18K Near Colorless Diamond Ring Round-cut - 1.087ct
Regular price ¥590,000 (Tax incl.)Unit price per -
18K Round-cut Colorless Diamond Ring - 1.051ct
Regular price ¥540,000 (Tax incl.)Unit price per -
18K Round-cut Colorless Diamond Ring - 1.025ct
Regular price ¥540,000 (Tax incl.)Unit price per -
18K Emerald-cut Colorless Diamond Ring - 1.756ct
Regular price ¥1,500,000 (Tax incl.)Unit price per -
18K Pear-cut Colorless Diamond Ring - 1.547ct
Regular price ¥1,150,000 (Tax incl.)Unit price per -
18K Princess-cut Colorless Diamond Ring - 1.302ct
Regular price ¥660,000 (Tax incl.)Unit price per -
18K Round-cut Near Colorless Diamond Ring - 0.826ct
Regular price ¥490,000 (Tax incl.)Unit price per -
18K Colorless Diamond Ring Round-cut 1.352ct
Regular price ¥770,000 (Tax incl.)Unit price per -
18K Colorless Diamond Ring Cushion-cut - 1.12ct
Regular price ¥780,000 (Tax incl.)Unit price per -
18K 3 Stones Colorless Diamond Ring Emerald-cut - 1.502ct
Regular price ¥740,000 (Tax incl.)Unit price per -
18K Emerald-cut Colorless Diamond Ring - 1.256ct
Regular price ¥680,000 (Tax incl.)Unit price per -
18K Pear-cut Near Colorless Diamond Ring - 0.96ct
Regular price ¥590,000 (Tax incl.)Unit price per -
18K Emerald-cut Near Colorless Diamond Ring - 1.02ct
Regular price ¥460,000 (Tax incl.)Unit price per -
18K Square Emerald-cut Colorless Diamond Ring - 1.69ct
Regular price ¥990,000 (Tax incl.)Unit price per -
18K Round-cut Colorless Diamond Ring - 0.695ct
Regular price ¥370,000 (Tax incl.)Unit price per -
18K Cushion-cut Near Colorless Diamond Ring - 1.86ct
Regular price ¥1,250,000 (Tax incl.)Unit price per -
18K Colorless Emerald-cut Diamond Ring VVS2 - 0.87ct
Regular price ¥580,000 (Tax incl.)Unit price per -
18KPG Pear Colorless Diamond Ring - 0.837ct
Regular price ¥350,000 (Tax incl.)Unit price per -
Radiant Colorless Diamond Ring - 1.18ct
Regular price ¥1,100,000 (Tax incl.)Unit price per -
Radiant Near Colorless Diamond Ring - 1.29ct
Regular price ¥630,000 (Tax incl.)Unit price per -
Pear Colorless Diamond Ring - 0.868ct
Regular price ¥550,000 (Tax incl.)Unit price per -
Round Near Colorless Diamond Ring - 0.983ct
Regular price ¥540,000 (Tax incl.)Unit price per -
18KYG Round-cut Near Colorless Diamond Ring - 1.019ct
Regular price ¥420,000 (Tax incl.)Unit price perNEW -
18KYG Near Colorless I Cushion Diamond Ring - 0.873ct
Regular price ¥430,000 (Tax incl.)Unit price per -
PT900 Pear Fancy Light Yellow Diamond Ring - 1.425ct
Regular price ¥670,000 (Tax incl.)Unit price per -
18K Heart-cut Fancy Vivid Yellow Orange Diamond Ring - 0.734ct
Regular price ¥380,000 (Tax incl.)Unit price perNEW -
Mael Cushion Very Light Diamond Ring - 0.845ct
Regular price ¥280,000 (Tax incl.)Unit price per -
18K Oval-cut Vivid Yellow Diamond Ring - 0.59ct
Regular price ¥920,000 (Tax incl.)Unit price per -
18KWG Cushion Fancy Green Yellow Diamond Ring - 0.97ct
Regular price ¥740,000 (Tax incl.)Unit price per -
Mael Cushion Fancy Light Greenish Yellow Diamond Ring - 0.806ct
Regular price ¥480,000 (Tax incl.)Unit price per -
18K Radiant-cut Fancy Brownish Pink Diamond Ring - 0.623ct
Regular price ¥390,000 (Tax incl.)Unit price perNEW -
18K Cushion-cut Light Pink Diamond Ring - 0.71ct
Regular price ¥790,000 (Tax incl.)Unit price per -
Mael Cushion Very Light Pink Diamond Ring - 0.735ct
Regular price ¥600,000 (Tax incl.)Unit price per -
Sold out18K Pear-cut Near Colorless Diamond Ring - 0.6ct
Regular price ¥310,000 (Tax incl.)Unit price perSold out
How to Choose an Engagement Ring
Color Grade and Clarity — Getting the Quality Balance Right
For an engagement ring worn every day, the balance between color grade and clarity matters more than either factor in isolation. Our collection runs from D color (the highest GIA grade) through J, with around 28 diamonds in the Colorless range (D-F) and around 10 in Near Colorless (G-J). D through F color diamonds offer the brightest, most transparent appearance, the stone has no perceptible warmth or tint, which is particularly striking in a solitaire setting. G and H color diamonds look virtually identical to D-F in most lighting conditions when set in white gold or platinum, which means the same budget can often be applied to a larger carat weight or higher clarity grade. On clarity, VS1 and VS2 are the most common grades in this collection. Both are eye-clean and offer excellent quality for an engagement ring. SI1 and SI2 grades are also represented, and while they may have inclusions visible under magnification, they are usually eye-clean and offer strong value. VVS and IF stones are available for buyers prioritizing maximum clarity.
Choosing a Shape — for the Hand That Will Wear It
Diamond shape is one of the most personal decisions in choosing an engagement ring, the right choice depends on the wearer's aesthetic preferences and how the stone looks on their hand. Round cut is the most universally flattering and the most brilliant of all shapes, making it the most chosen engagement ring diamond worldwide and the most represented shape in our collection (around 12 stones). Cushion cut has a soft, rounded outline with a slightly warmer brilliance that appeals to buyers who find round cut too classic or sharp, it is the second most popular shape here and suits both traditional and contemporary ring settings. Pear cut (also around 11 stones) creates an elongated silhouette that makes fingers appear longer and more slender — it is distinctive without being unconventional, and works beautifully as a proposal ring. Emerald cut produces a different kind of sparkle, the long step-cut facets create a hall-of-mirrors effect that emphasizes clarity and depth rather than surface brilliance, and suits buyers drawn to a more understated, architectural aesthetic. Oval cut combines the brilliance of round with the elongated silhouette of pear. Radiant cut offers strong brilliance in a more square or rectangular outline, appealing to buyers who want round-cut sparkle in a different shape.
Fancy Color Diamond Engagement Rings
For buyers looking for something beyond the traditional, we carry engagement rings featuring natural yellow, pink, and green fancy color diamonds — all GIA or CGL certified. A color diamond engagement ring carries a different kind of significance: the stone is rarer, more individual, and in some cases holds a stronger long-term investment case than its colorless equivalent. Pink diamond engagement rings have become particularly sought after since the 2020 closure of the Argyle mine in Western Australia, which produced the vast majority of the world's natural pink diamonds. Yellow diamond engagement rings offer vivid, warm color at a more accessible price point than pink — Fancy Vivid Yellow Canary diamonds are the most striking option in this category. Green diamond engagement rings are exceptionally rare and suit buyers looking for a truly one-of-a-kind proposal ring. Browse our full color diamond ring collection for more options.
Metal, Carat Weight, and Budget
18K white gold dominates our engagement ring collection (around 40 out of 50 pieces), reflecting its status as the most popular metal for engagement rings in Japan, it frames colorless diamonds cleanly and is slightly more affordable than platinum. Platinum (PT900) is available across a smaller selection and offers superior hardness and durability for a ring worn daily. 18K yellow gold and rose gold are available for color diamond rings where the warm metal enhances the stone's hue. Our collection ranges from ¥260,000 (a round 0.425ct E VVS2) to ¥1,500,000 (an emerald 1.756ct F SI2), with the most popular range — 0.5ct to 1ct in VS or SI clarity — sitting between ¥350,000 and ¥800,000. Free ring sizing is available. If you need guidance finding the right combination within your budget, contact us or visit our office in Okachimachi.